Swollen fingers in the morning may be caused by improper sleep posture, but may also be due to certain disease factors, but is not limited to four. Usually, the diseases that may cause finger swelling in the morning are mainly rheumatoid arthritis, cervical spondylosis, osteoarthritis, carpal tunnel syndrome, etc.: 1, rheumatoid arthritis: mainly due to immune disorders resulting in activated inflammatory cells attacking joint tissue triggering arthritis symptoms, early rheumatoid arthritis usually manifests as early finger swelling, stiffness or pain, generally known as morning stiffness; 2, cervical spondylosis. Deformation of the cervical vertebrae may compress the spinal nerve, resulting in the ulnar or radial nerve that innervates the fingers being affected, resulting in morning finger swelling, numbness and other symptoms, which may also be accompanied by neck and shoulder and upper limb pain, etc.; 3, osteoarthritis: may be due to the patient’s age, obesity or genetic factors that cause damage to the articular cartilage, and early symptoms such as finger swelling and numbness may occur in the morning; 4, carpal tunnel syndrome : It is caused by compression of the carpal tunnel or swelling of the contents of the carpal tunnel, resulting in compression of the median nerve in the carpal tunnel, causing swelling, numbness or pain in the fingers innervated by the median nerve, and may also be accompanied by pain in the arm between the hand and elbow. In addition, early symptoms of stroke caused by hypertension and heart disease may also manifest as swelling and numbness in one side of the finger, and may also be accompanied by numbness in the same side or tongue. Chronic cardiac insufficiency or abnormal kidney function may also present with swollen fingers in the morning, which may be accompanied by edema in the face or legs.