What does it mean when small blisters appear on the hands and cause itching?

Small blisters appearing on the hands accompanied by itching may be caused by various skin conditions, mainly including: 1. Dyshidrotic eczema: This condition is characterized by clusters of small blisters on the palms or between the fingers, accompanied by intense itching and sometimes pain. Dyshidrotic eczema often occurs when the hands sweat and then come into contact with cold water or alkaline cleaning solutions, causing sweat to be trapped under the skin. 2. Contact dermatitis: Prolonged contact with irritants such as soap, dish detergent, low-quality cosmetics, pollen, or alcohol may trigger contact dermatitis. This condition causes red rashes, blisters, itching, and flaking of the skin. 3. Eczema: Eczema can be triggered by various factors including external irritants, allergens, immune dysfunction, and hereditary predisposition. Symptoms include tiny blisters on the hands, severe itching, and possible oozing. 4. Tinea manuum (hand fungus): Hand fungus is a contagious skin condition caused by fungal infection. Symptoms include skin flaking, blistering, dryness, and itching. 5. Excessive internal dampness: According to traditional Chinese medicine theory, excessive internal dampness may also lead to small blisters and itching on the skin surface.