Hand swelling after staying up all night is mainly considered to be related to cardiovascular system diseases, upper extremity vascular lesions, poor posture or finger joint inflammation. 1. cardiovascular system diseases: for patients with cardiovascular system diseases, it is easy to produce the problem of blood circulation, after staying up all night, it will aggravate the burden on the heart, due to the end of the hand blood reflux obstacles, so it is easy to produce the symptom of hand swelling. 2. Upper extremity vascular lesions: If there are upper extremity vascular varicose veins or venous thrombosis and other problems, it is easy to affect the blood return, so after staying up late, most of the blood is concentrated in the lower extremity parts, it is easy to produce hand swelling performance. 3. Poor posture: stay up for a long time sagging arm or arm pressure, easy to affect the blood circulation of the hand, which will trigger the symptoms of hand swelling. 4. Inflammation of finger joints: for patients with inflammation of finger joints, such as rheumatoid arthritis, after staying up all night may trigger an increase in inflammatory exudate, resulting in the phenomenon of hand swelling. Usually try not to stay up late, maintain a regular lifestyle, if the symptoms of hand swelling is more serious, you need to consult a doctor in a timely manner, a clear diagnosis, targeted treatment under the guidance of the doctor, so as not to delay the condition.