The swelling of the little finger every morning can be categorized into physiological causes and pathological causes. Physiological causes are caused by compression due to improper sleeping posture; pathological causes are mostly considered to be caused by cervical spondylosis, rheumatoid, and venous return obstruction of the upper extremities. 1. Improper sleeping position: when sleeping in an improper position, the arm or finger is compressed, resulting in poor blood circulation, swelling will occur. However, this phenomenon is a normal physiological phenomenon and does not require special treatment. 2. Cervical spondylosis: when cervical spondylosis compresses the nerve root, it will induce autonomic nerve disorder and finger swelling. At this time, the patient should go to the local hospital in time to check the cervical spine CT and MRI for early diagnosis and corresponding treatment. 3. Rheumatoid: Rheumatoid is easy to involve the human fingers and joints and other parts of the body, if the patient early onset of swelling of the little finger, often symmetrical onset of both hands, and accompanied by a sense of stiffness. It is recommended to check the blood routine in time and take X-ray film of the hand for further diagnosis. 4. Upper extremity venous return obstruction: Upper extremity venous thrombosis, or upper extremity lymphatic abnormalities, can easily induce venous return obstruction. The patient will show swelling of the hands, during this period, it is recommended to check the ultrasound of the blood vessels of the upper limbs as soon as possible for further clarification. If the patient wakes up in the morning and finds that the little finger is swollen, excluding physiological reasons, he should go to the local hospital in time, and find out the problem as soon as possible and treat it as soon as possible.