Hand swelling may be caused by trauma, cervical spondylosis, carpal tunnel syndrome, infection, vascular disease, autoimmune disease and other causes. 1. Trauma: If the hand is squeezed or violently injured, causing soft tissue contusion, the blood circulation of the hand and venous return is obstructed, which can cause localized edema of the hand, resulting in the symptom of hand swelling. 2. Cervical spondylosis: Cervical spondylosis causes local spinal nerve roots to be compressed and irritated, which may cause hand swelling. 3. Carpal Tunnel Syndrome (CTS): Hand swelling may occur when the hand muscles are strained due to prolonged exertion, resulting in edema of the surrounding tissues. 4. Infection: the soft tissues of the hand are infected by bacteria and other infections, which can cause local symptoms such as redness, swelling, congestion, distension and elevated skin temperature. 5. Vascular diseases: such as vasculitis, deep vein thrombosis and other diseases can cause venous reflux obstruction, which leads to extremity bruising symptoms of hand swelling, but also accompanied by hand pain, hot and dry. 6. Autoimmune diseases: such as rheumatoid arthritis and other diseases can produce inflammatory stimulation of the tissues around the joints of the hands, thus causing swelling of the hands, morning stiffness and other symptoms. There are many causes of hand swelling, it is recommended to consult a doctor in time to clarify the cause of the disease and then actively treat it, so as not to delay the condition.