Swelling and itching of hands may be related to eczema, frostbite on hands, allergies and other reasons. 1. Eczema: emotional tension, external stimuli and other internal and external factors, can lead to inflammatory reactions in the hands, swelling of the hands, itching symptoms. 2. Frostbite: the body suffers from low-temperature attack can cause hand injury, there may be localized redness, swelling, congestion, self-awareness of heat, itching, tingling and other symptoms. 3. Allergy: contact with allergens triggers an allergic reaction, which can lead to swelling and itching of the hands, which may be accompanied by rashes and other manifestations. It is recommended that people with swollen and itchy hands go to the hospital in a timely manner to clarify the cause of the disease and standardize the treatment under the guidance of the doctor.