The swelling of the hands may be caused by the following reasons: 1. The hands are pressed by other parts of the body while sleeping, resulting in local swelling due to long-time ischemia, hand activities can be carried out to promote local blood circulation, and the swelling of the hands will soon disappear. 2. The symptoms of allergy in the soft tissues of the hands are common because the hands are in contact with things that are easily allergic, such as mites or mosquito bites. The allergic reaction, in addition to hand swelling, will also appear to have itching symptoms. If the allergy is severe, it can also affect other parts of the body with a rash like a windbreak, and the symptoms are mainly itching.3 Synovitis of the hands. Reduced hand activity during sleep, obstructed blood circulation, congestion of the chemical membrane, swelling of the fingers