Clinically there are no four diseases to be alerted to the swelling of the fingertips, the swelling of the fingertips may be due to trauma, inguinitis, osteoarthritis and other conditions. 1. Trauma: usually the patient’s fingertips by external impact or extrusion, resulting in finger trauma, often appear the symptoms of swelling of the fingertips, and will also be accompanied by local pain. 2. Nail groove inflammation: Usually, nail groove inflammation is due to secondary bacterial infection, mostly caused by deep nail trimming, frequent manicure, biting and sucking the fingers, and long-term contact with irritating substances. Patients often appear redness, swelling, pain and other symptoms of the perinail tissue, which can also be manifested as swelling of the fingertips. Some serious cases can also be accompanied by the discharge of pus from the nail groove. 3. Rheumatoid arthritis: this disease is mainly autoimmune disease, can be manifested as finger joints swelling, pain, may also be accompanied by activity limitation, patients check the rheumatoid factor, anti-CCP antibody increase and so on. It is recommended that patients with symptoms of swollen fingers, timely hospital consultation, to clarify the cause of the disease, follow the doctor’s instructions for systematic treatment, so as to avoid aggravation of the condition.