What causes blisters on the fingers?

Generally, the appearance of dyshidrotic eczema (sweat blisters) on the palms may be caused by seasonal changes, high temperature and humid environments, impaired sweat excretion, fungal infections, or eczema. If discomfort occurs, it is recommended to seek medical attention promptly. Detailed explanations are as follows:

1. Seasonal Changes

During seasonal transitions, fluctuations in temperature and humidity can disrupt the moisture balance of the skin on the fingers, potentially leading to obstruction of sweat glands. This causes sweat to accumulate beneath the skin, resulting in the formation of sweat blisters. These are usually accompanied by mild itching or a prickling sensation. It is advisable to keep hands dry and avoid prolonged contact with water or damp environments.

2. High Temperature and Humid Environments

Hot and humid conditions can easily impair normal sweating of the finger skin, causing sweat to become trapped under the skin. This may lead to the development of sweat blisters on the fingers, often accompanied by itching and a burning sensation. It is recommended to maintain clean and dry hands and avoid staying in hot, humid environments for extended periods.

3. Impaired Sweat Excretion

When sweat cannot be properly excreted through the skin on the hands, it accumulates beneath the skin surface, triggering the formation of sweat blisters. Symptoms commonly include itching and a burning sensation. It is recommended to follow a doctor’s guidance in using medications such as betamethasone tablets, triamcinolone acetonide tablets, or hydrocortisone tablets for treatment.

4. Fungal Infection

Fungal infection of the finger skin may compromise the skin barrier, leading to obstructed sweat gland function and the subsequent development of sweat blisters. This condition is often accompanied by symptoms such as skin flaking and cracking. Under medical supervision, antifungal medications such as flucytosine tablets, nystatin tablets, or fluconazole capsules may be used for treatment.

5. Eczema

Chronic skin inflammation (eczema) on the fingers may result from persistent skin irritation or infection. Eczema is a chronic inflammatory skin condition that may present as sweat blisters on the fingers, along with symptoms like dryness and itching. Treatment should follow medical advice and may include topical agents such as desonide cream, fexofenadine hydrochloride tablets, or erythromycin ointment.

Routinely maintaining personal hygiene, including frequent bathing and changing clothes, is important for preventing the onset of such conditions.