In general, the inability to bend the tips of the fingers may be a loss of function; it may also be caused by overwork, rheumatoid arthritis, tenosynovitis, and other factors, and is not a loss of function. Loss of function may be caused by the inability of the fingertips to stretch or bend, long-term stiffness, and the inability of the finger joints to move. If the inability to bend the finger tips is caused by overwork, rheumatoid arthritis, tenosynovitis, etc., if the symptoms are mild, usually pay attention to rest and avoid excessive activities of the fingers, or through timely and active treatment and functional exercises in the later stage, in most cases, the symptoms can be relieved, and generally does not belong to the loss of function. If the symptom of the inability to bend the tip of the finger is not relieved, or aggravated and accompanied by other symptoms, you should go to the hospital in time to see a doctor, and give targeted treatment after clarifying the cause.