The causes of swelling in both hands are usually as follows: 1. overexertion or trauma may cause injury to the muscles and ligaments of both hands, resulting in swelling of the hands. 2. rheumatoid arthritis may cause joint immobility in the morning, swelling and pain in both hands, and deformity of the finger joints in severe cases, resulting in impaired movement. 3. The patient with carpal tunnel syndrome may also have swollen hands due to malnutrition, gastrointestinal disorders, impaired absorption of nutrients, and hypoproteinemia. 4, patients with carpal tunnel syndrome may also have swollen hands. It is necessary to pay attention to rest, avoid straining, elevate the affected limbs appropriately to reduce the swelling, and apply magnesium sulfate solution for wet compresses to relieve the symptoms of swelling. If the symptoms still do not improve, further examination is needed to clarify the cause.