Fingernail joint pain is considered to be caused by trauma, onychomycosis and onychomycosis and other diseases. 1. Trauma: refers to the injury caused by the body being hit by the outside world. If the fingernail joint is traumatized, it may cause local pain. 2. Nail groove inflammation: It is usually characterized by redness, swelling, pain and tenderness, and is commonly found in the tissues around the nail. The etiology of the disease may be related to minor trauma secondary to bacterial infection, contact with irritants and other factors. 3. Ringworm of the nails: mainly related to dermatophytes, it may be caused by fungal infections such as Trichophyton suis and Trichophyton rubrum. The patient’s nail plate will appear cloudy, thickening, separation and other symptoms, can also be manifested as pain, under the nail bleeding, etc. Some patients may have a painful sensation at the finger nail joints. There are many causes of fingernail joint pain, and patients are advised to seek medical examination to clarify the cause.