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Why are the corners of my mouth itchy and black?

2025-10-16 22:37:37 educate

Why are the corners of my mouth itchy and black?

Recently, many netizens have reported on social platforms the problem of itching and blackening of the corners of their mouths, which has aroused widespread concern. In order to help everyone better understand this phenomenon, we have compiled the hot topics on the Internet and the advice of medical experts in the past 10 days. The following is a detailed analysis.

1. Common causes of itchy and black corners of the mouth

Why are the corners of my mouth itchy and black?

reasonSymptomsPossible causes
CheilitisRedness, swelling, peeling, and itching at the corners of the mouthAllergies, vitamin deficiencies, frequent lip licking
fungal infectionBlackening, erosion, white dischargeLow immunity, humid environment
Pigmentationlocalized skin darkeningSun exposure, friction, endocrine disorders
contact dermatitisItching, erythema, blistersCosmetics, toothpaste, food irritation

2. Recent hotly discussed cases on the Internet

According to social platform statistics, the number of discussions about "itchy and black corners of the mouth" has increased significantly in the past 10 days. The following are the most popular related topics:

platformHashtagNumber of discussions (10,000)
Weibo# Self-help method for black corners of the mouth#12.3
little red book"Cheilitis Recovery Record"8.7
Zhihu“How to treat fungal infection at the corner of the mouth?”5.2

3. Advice from medical experts

1.Basic care:Keep the corners of your mouth dry, avoid licking your lips, and use non-irritating lip balm.
2.Diet modification:Supplement B vitamins (such as B2, B12) and reduce the intake of spicy food.
3.Medication:Fungal infections require antifungal ointments (such as ketoconazole), and dermatitis requires short-term use of weak steroid ointments.
4.Medical tips:If symptoms persist for more than 1 week or are accompanied by ulceration or exudation, you need to see a dermatologist promptly.

4. TOP3 effective methods tested by netizens

methodSupport ratioThings to note
Erythromycin ointment + vitamin E mixed application68%Effective against bacterial infections, but not against fungi
3% boric acid solution wet compress52%2 times a day, 5 minutes each time
Oral vitamin B complex79%Requires continuous supplementation for more than 2 weeks

5. Preventive measures

• Avoid using fluoride toothpaste (some people may be allergic)
• Enhance lip sun protection in autumn and winter
• Disinfect tableware regularly to prevent cross-infection
• Control the intake of sweets (high-sugar environments can easily breed fungi)

If your symptoms match the above description, it is recommended to try basic care for 2-3 days. If there is no improvement or worsening, be sure to go to a regular hospital for fungal microscopy or allergen testing. Paying attention to whether the use time of specific foods and cosmetics coincides with daily observation will help doctors determine the cause of the disease.

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