If one side of the hand is swollen when the patient wakes up in the morning, it is possible that the patient has been lying on one side for a long time during sleep, which causes poor blood circulation in one side of the hand, which may lead to the symptoms of swelling and pain in the hand. In addition, hand swelling in the morning may also be caused by overwork, such as patients engaged in heavy physical labor for a long time, which can cause chronic injury to the joints of the hand, resulting in carpal arthritis, which may cause swelling and pain in the joints of the hand. Swelling of the hands, there may also be suffering from carpal tunnel syndrome, patients suffering from carpal tunnel syndrome may have numbness and swelling of the hands. In addition, there is also the possibility of suffering from rheumatoid, patients suffering from rheumatoid arthritis can appear the symptoms of morning stiffness, the patient woke up in the morning when the swelling of the hands, joint hypermobility, joint pain symptoms. Therefore, the appearance of hand swelling should pay attention to rest, avoid exertion, and need further examination to clarify the diagnosis.