Impaired Oral Mucous Membrane Integrity is the NANDA-I nursing diagnosis for injury to the lips and the soft tissues of the mouth, such as sores, ulcers, cracks, dryness, bleeding, or white patches. It is most common with chemotherapy, radiation to the head and neck, dehydration, oxygen therapy, mouth breathing, and a breathing tube. Common companion diagnoses are Acute Pain when mouth sores hurt, Inadequate Nutritional Intake when pain makes eating hard, and Risk for Infection when broken mucosa meets a weak immune system. Nursing care centers on a daily mouth assessment, gentle and regular oral care with a soft brush and bland rinses, pain control before meals, fluids and soft food, and watching closely for infection and bleeding.
At a glance
- What it is
- Injury to the lips, gums, tongue, cheeks, or floor of the mouth. Oral mucositis is the painful inflammation and ulceration caused by cancer treatment; stomatitis is the broader term for inflammation of the mouth.
- Who gets it
- Clients receiving chemotherapy, radiation to the head and neck, or a stem cell transplant; clients who are dehydrated, malnourished, NPO, on oxygen, mouth breathing, or intubated; older adults; clients with dentures, poor oral hygiene, diabetes, or a weak immune system; and clients who smoke or drink alcohol.
- Key signs
- Mouth pain or burning, redness, sores or ulcers, white or coated patches, bleeding or swollen gums, cracked lips, dry mouth, bad breath, changes in taste, and trouble chewing, swallowing, or talking.
- Nursing focus
- Inspect the mouth every shift with a light, give or teach oral care on a regular schedule, use bland rinses, avoid alcohol mouthwash and lemon-glycerin swabs, treat pain before meals, keep the client hydrated and fed, and report signs of infection.
- Act now
- Report fever in a client receiving chemotherapy at once, because it may be neutropenic fever. Escalate new bleeding that will not stop, pain that prevents drinking or swallowing saliva, drooling or trouble swallowing, swelling of the mouth or neck, or a dropping urine output.
Pathophysiology
The lining of the mouth is a thin layer of cells that renews itself every one to two weeks. Anything that damages these cells, slows their renewal, dries them out, or changes the normal mouth bacteria can break the lining down. Once the surface is broken, the mouth becomes painful, eating and drinking drop, and germs have an easy way into the bloodstream.
- Chemotherapy and radiation — these treatments target fast-dividing cells, and the cells lining the mouth divide fast. Damage starts deep in the tissue, sets off inflammation, and then the surface thins and ulcerates. With chemotherapy, sores usually appear within one to two weeks of a dose. With head and neck radiation, mucositis usually builds over the course of treatment and can last weeks after it ends.
- Dry mouth (xerostomia) — saliva washes, lubricates, and protects the mouth. Radiation to the salivary glands, dehydration, NPO status, oxygen therapy, mouth breathing, and drugs such as anticholinergics, antihistamines, diuretics, and opioids all reduce saliva.
- Mechanical and chemical injury — a breathing tube, ill-fitting dentures, broken teeth, hot or spicy food, tobacco, alcohol, and alcohol-based mouthwash irritate or tear the mucosa.
- Infection — a weak immune system, antibiotics, inhaled corticosteroids, and dentures let Candida (thrush) and herpes simplex grow. Infection deepens sores and can spread.
- Poor nutrition — low protein and low vitamin levels (such as B vitamins, folate, iron, and vitamin C) slow healing and can cause a sore, smooth tongue and cracks at the corners of the mouth.
Grading oral mucositis
Grading turns “it looks worse” into something you can chart and compare from shift to shift. Many cancer centers use the World Health Organization (WHO) oral toxicity scale shown here; others use the NCI CTCAE or their own tool.
| WHO grade | What you see | Can the client eat? |
|---|---|---|
| 0 | No changes | Normal diet |
| 1 | Soreness, with or without redness | Normal diet |
| 2 | Redness and ulcers | Can still eat solid food |
| 3 | Ulcers | Liquid diet only |
| 4 | Ulcers | Cannot eat or drink by mouth |
Nursing assessment
Subjective data
- Mouth or throat pain, burning, or tingling, with a 0 to 10 rating, and whether it is worse with eating, drinking, or talking
- Dry or sticky mouth, thick saliva, and changes in taste
- Trouble chewing or swallowing, coughing or choking with drinks, and what the client is able to eat now
- Usual oral care: how often they brush, what toothbrush, toothpaste, and mouthwash they use, and whether they wear dentures
- Cancer treatment: drug names, date of the last chemotherapy dose, and radiation site and week of treatment
- Medicines that dry the mouth or raise infection risk, such as anticholinergics, opioids, inhaled corticosteroids, and antibiotics
- Tobacco, alcohol, and recent dental problems or dental visits
Objective data
- Inspect the lips, gums, tongue, cheeks, palate, and under the tongue with a penlight and a tongue blade, with dentures out
- Color, moisture, and intactness of the mucosa; size and location of sores; and a grade on your facility’s scale
- White plaques that wipe off and leave a red base (suggests thrush); clusters of small blisters or ulcers on the lips (suggests herpes simplex)
- Bleeding gums, bruising, or blood blisters, especially when platelets are low
- Temperature, weight, intake and output, urine color, and skin turgor
- Ability to swallow saliva; drooling or pooling of secretions
- Lab results the provider orders, such as a complete blood count with absolute neutrophil count, platelets, albumin or prealbumin, and mouth swab cultures
Nursing diagnoses used with oral mucosa problems
- Impaired Oral Mucous Membrane Integrity — the main diagnosis when the lips or mouth tissues are already injured
- Acute Pain — mouth sores make eating, drinking, swallowing, and talking painful
- Inadequate Nutritional Intake — the client cannot take in enough food because of pain, taste changes, or dry mouth
- Risk for Infection — broken mucosa plus a weak immune system or a breathing tube
- Risk for Impaired Oral Mucous Membrane Integrity — before damage starts, such as at the start of chemotherapy or for an intubated client
- Deficient Fluid Volume or Risk for Deficient Fluid Volume — painful swallowing cuts fluid intake
- Impaired Swallowing — when the problem is moving food and fluid safely from mouth to stomach
- Impaired Dentition — decayed, broken, or missing teeth, or poorly fitting dentures
- Inadequate Health Knowledge — the client does not know how to care for the mouth during treatment
Worked care plans
Four plans in the same ADPIE shape. The scenario is a 56-year-old man in week 5 of 7 of radiation to the head and neck with weekly chemotherapy for throat cancer. He is admitted because mouth and throat pain has made eating and drinking very hard. He says it feels like “swallowing glass” and rates the pain 7 out of 10, worse when he swallows. He has stopped brushing his teeth because it hurts and has been using a store-bought mouthwash that contains alcohol. There are several ulcers on both cheeks and the sides of his tongue, and white patches on the tongue that wipe off and leave red, raw tissue. He is taking only sips of liquid, his weight is 81 kg (86 kg before treatment), his lips are cracked, and his urine is dark. Temperature is 37.4 °C, heart rate 96, blood pressure 118/72. His last blood count was within the range his oncologist expects at this point in treatment. The provider orders IV fluids, a scheduled pain medicine with an as-needed dose for breakthrough pain, a topical anesthetic rinse before meals, an antifungal for the thrush, a dietitian consult, a speech-language pathology swallow evaluation, and daily weights.
1. Impaired Oral Mucous Membrane Integrity
Problem-focusedSubjective: “I stopped brushing because it hurts too much.” “My mouth is so dry my tongue sticks.” “I use the strong mouthwash to keep it clean.”
Objective: Several ulcers on both cheeks and the sides of the tongue; white plaques on the tongue that wipe off and leave a red base; cracked lips; thick, sticky saliva; plaque on the teeth; WHO grade 3 mucositis (liquids only).
Impaired Oral Mucous Membrane Integrity related to inadequate oral hygiene, use of an alcohol-based mouthwash, and decreased salivation, associated with radiation therapy and chemotherapy, as evidenced by oral ulcers, white plaques, cracked lips, xerostomia, and reported oral pain.
- Client performs oral care with a soft toothbrush and a bland rinse on the agreed schedule, starting today
- White plaques clear and no new ulcers appear during the admission
- Lips and mouth stay moist, and the client reports less dryness within 48 hours
- Inspect the whole mouth every shift with a penlight and grade the mucositis on the facility’s scale; chart the size and site of each sore
- Remove the alcohol-based mouthwash and explain why: alcohol dries and stings the tissue
- Help him brush gently with an extra-soft toothbrush, softened in warm water, after meals and at bedtime; use a mild, non-foaming toothpaste if plain paste stings
- Set up a bland rinse, such as normal saline or a salt and baking soda rinse mixed per facility instructions, to swish and spit several times a day and after meals
- Give the ordered antifungal exactly as directed (swish and swallow or swish and spit, and how long to hold it in the mouth)
- Apply a water-based lip moisturizer; offer saliva substitutes and frequent sips of water
- Avoid lemon-glycerin swabs, hot or spicy food, acidic juices, tobacco, and alcohol
By day 3 he was brushing and rinsing on schedule without being reminded. The white plaques had cleared, no new ulcers had appeared, and his lips were no longer cracked. The existing ulcers remained, as expected until radiation ends. Goal partly met; continue the plan through the end of treatment.
2. Acute Pain
Problem-focusedSubjective: “It’s like swallowing glass.” Pain 7 out of 10, rising when he swallows or talks.
Objective: Grimaces and holds his throat when swallowing; avoids talking; spits saliva into tissues instead of swallowing; heart rate 96.
Acute Pain related to physical injuring agent (radiation-induced mucositis) as evidenced by a self-reported pain of 7 out of 10, guarding behavior, facial grimacing, and avoidance of swallowing and talking.
- Client reports pain at or below his own goal of 3 out of 10 before and during meals within 24 hours
- Client swallows his own saliva and fluids without stopping because of pain
- Rate pain with the same 0 to 10 scale before and after each intervention, and ask about pain with swallowing specifically
- Give the scheduled pain medicine on time rather than waiting for pain to build; use the as-needed dose for breakthrough pain as ordered
- Time the ordered topical anesthetic rinse and as-needed dose so they take effect before meals and oral care
- After a numbing rinse, check that he can cough and swallow safely before he eats, and teach him to take small sips and bites, because a numb mouth and throat raise the risk of choking and of biting or burning the tissue
- Monitor for sedation, slow breathing, and constipation with opioids, and give the ordered bowel regimen
- Offer cool fluids and soft, cool foods, which many clients find soothing
- Report pain that stays above his goal so the provider can adjust the plan
After 24 hours on scheduled pain medicine with the rinse before meals, he rated pain 3 out of 10 at meals and 2 out of 10 at rest. He was swallowing his saliva, was alert, and had a bowel movement on day 2. Goal met.
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NCLEX Readiness Diagnostic
Fifty questions with a written rationale on every option, scored by section so you can see which content area is weakest. Sent as a PDF.
3. Inadequate Nutritional Intake
Problem-focusedSubjective: “Everything tastes like metal.” “I’ve only had a few sips of shake a day for a week.”
Objective: Weight 81 kg, down from 86 kg before treatment (about 6% in 5 weeks); taking only sips of liquid; dark urine; dry mucosa; cracked lips.
Inadequate Nutritional Intake related to painful swallowing, altered taste, and dry mouth as evidenced by food intake below recommended amounts, weight loss of about 6% since starting treatment, and reported aversion to eating.
- Client meets the calorie, protein, and fluid targets the dietitian sets, starting within 48 hours
- Weight stays stable through the admission
- Client and family agree on a nutrition plan for home, including when a feeding tube would be discussed
- Weigh daily at the same time on the same scale, and keep a calorie count and intake and output record
- Coordinate with the dietitian for high-calorie, high-protein liquid and soft foods; offer small amounts often rather than three large meals
- Offer moist, bland, cool or room-temperature foods (smoothies without citrus, yogurt, pudding, eggs, mashed foods); avoid crunchy, spicy, salty, and acidic foods
- Give pain medicine and the numbing rinse so their peak effect falls at mealtimes
- Follow the speech-language pathologist’s swallow recommendations, sit him fully upright to eat, and watch for coughing or choking
- Give the ordered IV fluids and monitor urine color and output
- Report ongoing weight loss or intake that stays below target, so the team can discuss a feeding tube with the client
By day 3 he was drinking five supplement shakes a day plus soft foods, which met the dietitian’s protein target and most of his calorie target. His weight held at 81 kg and his urine was pale yellow. He and his wife agreed to see the dietitian weekly and to discuss a feeding tube with the oncologist if his weight drops again. Goal partly met.
4. Risk for Infection
RiskRisk factors present: Open ulcers in the mouth; oral thrush; inadequate oral hygiene before admission; inadequate nutritional intake; ongoing chemotherapy, which can lower white blood cell counts; dry mouth with reduced saliva. Temperature 37.4 °C.
Risk for Infection related to disrupted oral mucosa, inadequate oral hygiene, and inadequate nutritional intake, associated with chemotherapy and radiation therapy.
- Client stays free of fever and of new or spreading mouth infection during the admission
- Client states the signs of infection to report and how to take his temperature at home before discharge
- Monitor temperature at the frequency ordered and report a fever at once, following the facility’s neutropenic fever protocol
- Review the blood count results, especially the absolute neutrophil count and platelets, and report results outside the parameters the oncologist sets
- Keep up the oral care schedule, which lowers the number of bacteria and yeast in the mouth
- Watch for new white plaques, clusters of blisters, pus, swelling, or spreading redness, and report them so the provider can order cultures and treatment
- Perform hand hygiene before and after mouth care, and keep his toothbrush clean, dry, and stored upright; replace it if it becomes contaminated
- Clean dentures daily, soak them as directed, and leave them out at night and while sores are severe
- Support his nutrition and fluid intake (see plan 3), because protein and fluids are needed for the mucosa to heal
His temperature stayed below 37.8 °C for the admission, the thrush cleared with treatment, and no new infection developed. Before discharge he named fever, chills, new white patches, and pus as signs to report and showed how he would take his temperature. Goal met.
Interventions and rationales
Client and family teaching
- Look in your mouth every day with a flashlight and a mirror, and tell your care team about new redness, sores, white patches, or bleeding
- Brush gently with an extra-soft toothbrush after meals and at bedtime, even when your mouth is sore. Soften the bristles in warm water and replace the brush often
- Rinse with the bland rinse your team recommends several times a day. Do not use mouthwash that contains alcohol
- Keep your mouth moist: sip water often, use the saliva substitute or lip moisturizer your team suggests, and use a humidifier at night if advised
- Choose soft, moist, bland foods, and avoid spicy, salty, crunchy, acidic, and very hot foods and drinks
- Do not smoke or drink alcohol; both slow healing and irritate the mouth
- If you wear dentures, take them out to clean them every day, leave them out at night, and leave them out when your mouth is very sore
- Take pain medicine as prescribed before meals and brushing, and wait until the numbness from a numbing rinse wears off before eating hot foods
- Weigh yourself as your team directs and report weight loss or trouble eating and drinking
- Call your cancer team right away for a fever at the temperature they gave you, chills, mouth pain that stops you from drinking, bleeding that will not stop, or trouble swallowing or breathing
NurseStudyPrep.com
You’ve read the care plan. Now answer one.
A priority item in the NCLEX format. On Prep, every option gets a written rationale — including the three that are wrong.
The nurse is caring for four clients receiving chemotherapy who have oral mucositis. Which finding requires the nurse’s action first?
Why C. A fever with a very low neutrophil count is neutropenic fever, a medical emergency that can progress quickly to sepsis, and open mouth sores give bacteria a direct route into the blood. The nurse reports it at once and follows the neutropenic fever protocol. Option A suggests thrush, which needs treatment but is not immediately life-threatening. Option B needs a pain plan review. Option D needs moisture and oral care. Prep also explains why each wrong option looks reasonable.
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Frequently asked questions
What is the nursing diagnosis for mouth sores?
The NANDA-I label is Impaired Oral Mucous Membrane Integrity. A typical statement is “Impaired Oral Mucous Membrane Integrity related to inadequate oral hygiene and decreased salivation as evidenced by oral ulcers, oral pain, and xerostomia.” Acute Pain, Inadequate Nutritional Intake, and Risk for Infection are common companion diagnoses.
What is the difference between impaired oral mucous membrane and impaired dentition?
Impaired Oral Mucous Membrane Integrity is about the soft tissues: lips, gums, tongue, and the lining of the cheeks. Impaired Dentition is about the teeth, such as decay, broken or missing teeth, or poorly fitting dentures. A client can have both.
What mouth care is best for a client with oral mucositis?
Gentle brushing with an extra-soft toothbrush after meals and at bedtime, bland rinses such as normal saline several times a day, and keeping the mouth moist. Avoid alcohol mouthwash, lemon-glycerin swabs, and irritating foods. Follow your facility’s protocol for any medicated rinses.
Why should lemon-glycerin swabs not be used for mouth care?
Lemon dries the mouth and can wear down tooth enamel, and glycerin pulls moisture from the tissue. Together they leave the mucosa drier and more irritated, especially in clients who already have little saliva.
How do you tell oral thrush from mucositis?
Thrush usually shows creamy white patches that wipe off and leave a red, sometimes bleeding, base. Mucositis shows redness and ulcers that do not wipe away. Both can happen at the same time during cancer treatment; report white patches so the provider can decide on an antifungal.
When does a client need the risk diagnosis instead?
Use Risk for Impaired Oral Mucous Membrane Integrity when the mouth is still intact but risk factors are present, such as a client starting chemotherapy, on oxygen, NPO, or intubated. It lists risk factors only, with no “as evidenced by.”
References
- Herdman, T. H., Kamitsuru, S., & Lopes, C. T. (Eds.). NANDA International Nursing Diagnoses: Definitions and Classification, 2024–2026. Thieme.
- Elad, S., Cheng, K. K. F., Lalla, R. V., et al. MASCC/ISOO clinical practice guidelines for the management of mucositis secondary to cancer therapy. Cancer, 2020;126(19):4423–4431.
- National Cancer Institute. Oral Complications of Cancer Therapies (PDQ®) — Health Professional Version. National Cancer Institute.
- World Health Organization. WHO Handbook for Reporting Results of Cancer Treatment. WHO, 1979.
- Klompas, M., Branson, R., Cawcutt, K., et al. Strategies to prevent ventilator-associated pneumonia, ventilator-associated events, and nonventilator hospital-acquired pneumonia in acute-care hospitals: 2022 update. Infection Control & Hospital Epidemiology, 2022;43(6):687–713.
- Freifeld, A. G., Bow, E. J., Sepkowitz, K. A., et al. Clinical practice guideline for the use of antimicrobial agents in neutropenic patients with cancer: 2010 update by the Infectious Diseases Society of America. Clinical Infectious Diseases, 2011;52(4):e56–e93.
- Pappas, P. G., Kauffman, C. A., Andes, D. R., et al. Clinical practice guideline for the management of candidiasis: 2016 update by the Infectious Diseases Society of America. Clinical Infectious Diseases, 2016;62(4):e1–e50.
- Ackley, B. J., Ladwig, G. B., Makic, M. B. F., Martinez-Kratz, M. R., & Zanotti, M. Nursing Diagnosis Handbook: An Evidence-Based Guide to Planning Care (13th ed.). Elsevier, 2023.
- Silvestri, L. A. Saunders Comprehensive Review for the NCLEX-RN Examination. Elsevier, 2023.
Mucositis grading tools, oral care products and schedules, rinse recipes, platelet and neutrophil thresholds, fever thresholds, and pain medicine orders vary by client, by provider, and by facility. Follow the provider’s orders and your own institution’s policies and protocols. This page supports study and does not replace course instruction or clinical judgment.
