Swelling of the fingertips from insect bites is considered to be the most likely cause of insect bite dermatitis. If the symptoms are mild, it can be cured by itself; if the condition is serious, such as secondary bacterial infection, generally can not be recovered by itself, and need to be actively treated. Insect bites on the fingertips can cause insect bite dermatitis, manifested by the bite site of the wind, accompanied by localized edema, itching, etc., the disease is an allergic reaction of the skin to the venom secreted by the insect. If the symptoms are mild, only localized redness, swelling, itching, and then after a cold compress will generally recover gradually. If the fingertip is bitten by the bug, the deep connective tissue of bacterial infection, can be manifested as local redness, swelling, pain, etc., can also be accompanied by fever, chills and other systemic symptoms. The disease cannot be cured by itself, and requires systematic application of sensitive antibiotic treatment, such as penicillin or cephalosporin antibiotics, etc., and localized abscess incision and drainage if necessary. It is recommended that patients with swollen fingertips from insect bites should go to a regular hospital in time to get a clear diagnosis and standardized treatment under the guidance of a doctor. Drugs need to be used in accordance with medical advice.