What causes small blisters at the corner of the mouth?
Generally, small blisters at the corners of the mouth may be caused by weather changes, dietary irritation, lack of sleep and fatigue, oral ulcers, or oral candidiasis (thrush). It is recommended to seek medical advice promptly to identify the underlying cause and receive appropriate treatment. Specific causes are analyzed as follows:
1. Weather Changes
Cold or dry climates can cause dryness of the skin at the corners of the mouth, leading to the formation of small blisters. It is important to keep the area moisturized by using lip balms or petroleum jelly regularly.
2. Dietary Irritation
Excessive consumption of spicy, greasy, or irritating foods may irritate the mucous membranes of the lips, causing local congestion and swelling, which can result in small blisters. It is advisable to increase intake of fresh vegetables and fruits to ensure sufficient vitamins and minerals.
3. Lack of Sleep and Fatigue
Chronic sleep deprivation or excessive fatigue can weaken the immune system, making the lip mucosa more susceptible to external irritants and resulting in blisters. Maintaining adequate sleep and avoiding late nights is essential.
4. Oral Ulcers
Oral ulcers may develop due to dietary irritation, reduced immunity, or imbalance of oral flora, leading to blister formation, often accompanied by symptoms such as pain and redness. Under medical guidance, patients may use medications such as oral ulcer powder, cydiodine tablets, or Niuhuang Jiedu tablets for treatment.
5. Oral Candidiasis (Thrush)
Oral candidiasis is primarily caused by infection with Candida albicans. The overgrowth of Candida in the mouth leads to white patches or small blisters on the lip mucosa, possibly accompanied by pain. Patients are advised to follow medical instructions and use antifungal medications such as nystatin tablets, sodium bicarbonate tablets, or fluconazole capsules.
In daily life, it is important to maintain a balanced diet, drink plenty of water, keep the mouth moist, practice good oral hygiene, and rinse the mouth after meals.
