Pain in the middle finger of the left hand is not necessarily a sign of disease, it may be physiological factors or pathological factors, physiological factors, prolonged exertion of the finger will lead to pain phenomenon; pathological factors, it may be caused by tenosynovitis, specific diseases (such as gout, rheumatoid, etc.) and other diseases. 1. Physiological factors: overwork or prolonged exertion of the hand may cause pain in the left middle finger, which will generally be relieved after changing the posture and taking proper rest. 2. Pathologic factors (1) Tenosynovitis: Frequent exertion or improper exercise can lead to tenosynovitis of the fingers, which will cause pain in the fingers. (2) Specific diseases: Suffering from specific diseases such as rheumatoid, gout, etc., which cause inflammation of the joints of the hand, will also cause finger pain. There are many causes of pain in the middle finger of the left hand, if the pain symptoms are not relieved, or accompanied by other symptoms, you should go to the hospital in time, after clarifying the cause to give targeted treatment.