Hand swelling may be caused by overwork, venous thrombosis, cervical spondylosis, cardiac and renal insufficiency. 1. Overwork: If you work with your hands for a long time, it can lead to hand muscle strain and lactic acid accumulation, which will lead to local tissue congestion and hand swelling. This situation generally need to rest, and elevate the hand, can promote the elimination of swelling. 2. Venous thrombosis: If venous thrombosis occurs, it may lead to poor venous blood flow in the hand, which may lead to hand swelling, and specific need to go to the hospital for examination. 3. Cervical spondylosis: after cervical spondylosis compresses the nerves, it will lead to vasoconstriction-diastolic dysfunction of the innervated blood vessels, resulting in sensory disorders, which can also lead to obvious swelling of the hands. 4. Cardiac and renal insufficiency: heart disease leads to blood reflux obstruction, kidney disease leads to water and garbage in the body can not be discharged from the body in a timely manner, may also lead to localized swelling of the body. If you have swollen hands, you must consult a doctor in time and follow the doctor’s instructions for examination and treatment, so as not to delay the condition.