Finger swelling may be caused by night sleep pressure, rheumatoid arthritis, systemic diseases, diabetes, tenosynovitis, synovitis and so on. 1. night sleep pressure: sleep up finger swelling may be sleeping at night due to poor posture arm pressure, resulting in poor blood return, get up and appropriate activities of the upper limbs, more fist movements can be slowly eliminated. 2. Rheumatoid arthritis: can also appear to sleep up the finger swelling, and accompanied by morning stiffness, serious finger deformation. 3. Systemic diseases: such as nephritis, renal failure, heart failure, hepatic insufficiency, hypoproteinemia can occur finger swelling. 4. Diabetes mellitus: diabetes causes peripheral circulatory disorders, the local blood supply is insufficient can also appear finger swelling, some will have numbness. 5. Tenosynovitis: Finger flexor tendon stenosis tenosynovitis in the morning can appear finger stiffness, swelling, flexion and extension activities, popping or stuck. 6. synovitis: synovial hyperplasia occurs aseptic inflammation can also appear finger swelling. There are also many causes of finger swelling in bed, such as trauma, vascular disease of the upper extremities, etc., if the persistence of non-relief, it is recommended that timely access to hospitals, improve the relevant examinations, to clarify the cause of the disease and follow the doctor’s instructions for targeted treatment, so as to avoid delays in the condition.