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, the infection caused by pus. If it’s an onychomycosis, it’s usually necessary to make an incision on both sides of the nail to drain the pus and check the depth of the wound. If the wound is shallow, it’s enough to change the dressing. If the wound is deeper, underneath the remaining nail, the nail will need to be removed and the wound will continue to be dressed later. If the abscess is caused elsewhere on the thumb, the surface of the abscess should be sterilized and then incised to drain the pus, and a vascular forceps should be used 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.