Hand swelling and itching may be caused by frostbite, contact dermatitis, fungal infection and other factors. 1. Frostbite: patients do not pay attention to the warmth of the hands in the cold winter, often work outdoors in cold temperatures, resulting in the formation of frostbite due to poor blood return to the nerve endings of the hands, causing hand swelling and itching. 2. Contact dermatitis: due to contact with allergic substances such as yams, pollen, etc., causing an allergic reaction, which leads to the patient’s hand swelling and itching, accompanied by other symptoms such as hand color redness. 3. Fungal infection: due to the patient’s contact with fungi, not timely cleaning, resulting in fungi in the fingers and breeding, hand swelling and itching, peeling. Patients with hand swelling and itching, it is recommended to consult a doctor in a timely manner to identify the cause of the disease, and then follow the doctor’s instructions for treatment, do not use medication, so as to avoid aggravation of the condition.