What causes many small, itchy bumps on the hands?
Disease description:
Today, many small bumps suddenly appeared on my hands, and they sometimes itch quite a bit. I don't know what caused this. May I ask what are the possible reasons for many itchy small bumps appearing on the hands?
Doctor's answer (1)
Dr. Wang Xiaoyan
There are several possible causes for the appearance of many itchy small bumps on the hands, including various dermatological conditions such as eczema, dyshidrotic eczema, tinea manuum (hand fungus), urticaria, allergic dermatitis, papular urticaria, solar dermatitis, and herpes zoster. Eczema and dyshidrotic eczema are usually triggered by factors such as allergies, humid environments, or emotional stress, and are characterized by papules, vesicles, or small blisters accompanied by itching. Tinea manuum is caused by fungal infection and presents with symptoms including redness, papules, scaling, and itching. Urticaria and allergic dermatitis are often associated with food, medication, or contact allergens, presenting with wheals, redness, swelling, and itching. Additionally, solar dermatitis and herpes zoster can also cause small bumps and itching on the hands; the former is induced by ultraviolet radiation, while the latter results from infection with the varicella-zoster virus. For accurate diagnosis and treatment, timely medical consultation and adherence to professional medical advice are recommended.
