Swollen hands and itchy, may be allergic dermatitis, may also be ringworm, gout and other causes, should promptly go to the hospital dermatology department to find out the cause of the disease. 1. Allergic dermatitis: skin allergic reactions caused by allergic substances, including hand eczema, allergic urticaria, allergenic contact dermatitis. When the patient’s hands come into contact with certain allergens, skin itching and swelling can occur, and skin damage such as pimples and blisters can also occur. 2. Ringworm: ringworm is a superficial skin fungal infection of the hands caused by dermatophytes, which is contagious and can occur in the interphalangeal region, the palm of the hand, the back of the hand and the wrist. At the onset of the disease can appear scattered small blisters, can be accompanied by hand itching, can also appear flaking, keratinization thickening, swelling and other manifestations. 3. Gout: in fatigue, high purine diet, drinking a lot of alcohol, irregular work and rest and other triggers, easy to lead to gout, can appear red and swollen hands, dysfunction, etc., some patients can also be accompanied by itching, arthralgia, and in severe cases, renal impairment can also occur. Swollen and itchy hands have other causes, such as sweating herpes, urticaria, etc., should be timely consultation, clear cause, and targeted treatment.