Left hand ring finger pain should first be excepted whether there is angina pectoris, myocardial infarction, myocardial infarction and angina pectoris, can appear on the back of the left shoulder and the left hand little finger, ring finger of the radiating pain, should first be performed electrocardiogram, cardiac enzyme profiling except cardiac disease. In addition to cardiac disease, there can be no history of trauma, observe the pain site with or without redness, swelling, fever, rupture, deformity, etc., if there is a recent history of injury, it is feasible to X-ray examination of the hand with or without fracture, etc., in addition to rheumatoid arthritis to the proximal interphalangeal joints of both hands mainly pain, joint deformity, etc., need to improve the rheumatoid factor and other tests to assist in the diagnosis of the joints of the left hand is also relatively common, the pain is mostly pins and needles, generally can be relieved by themselves. It can be relieved on its own.