Swelling and itching of the fingers may be caused by contact dermatitis, sweating herpes, hives, papular urticaria and other factors. 1. Contact dermatitis: Contact dermatitis is usually associated with exposure to exogenous substances, which may lead to localized swelling, itching and burning. 2. Sweat herpes: Sweat herpes tends to occur in the hot summer months and is considered to be related to environmental diseases, heredity, psychosomatic and personal factors. The main manifestation is the appearance of deep blisters on the skin of hands and feet, and some patients will have symptoms such as finger swelling, pain and itching. 3. Urticaria: The cause of urticaria is difficult to determine, and is considered to be related to food, infection, drugs, physical factors, and systemic factors. If the intake of allergy-inducing foods and medications, localized hives may appear with itching, resulting in swelling of the fingers. 4. Papular urticaria: Papular urticaria is an allergic skin disease, resulting in localized red, doughnut-like macules, which may be accompanied by tingling and burning sensation. It is recommended to pay attention to the protection of the hands in daily life, and if necessary, go to the dermatology department of the hospital to find the cause and give treatment for the cause.