Inflammation of the thumb, pus first of all depends on the location of the pus in the thumb, if it is on both sides of the nail, it is caused by onychomycosis; if it is in the other location of the thumb, it may be a foreign body pierced into the thumb, which causes pus after infection. If the nail groin infection, usually need to cut in both sides of the nail to drain the pus, explore the depth of the wound, if the wound is shallow, line wound dressing can be; if the wound is deeper, in the remaining nail underneath, you need to remove the nail, later wound continue to change the medicine. If the abscess is caused by other parts of the thumb, it is necessary to make an incision to drain the pus after sterilizing the surface of the abscess, and at the same time, use vascular forceps to investigate whether there is any foreign body inside. If there is a foreign body need to remove the foreign body, later wound dressing, oral antibiotic treatment can be.