Large abscesses do not disappear on their own and occur mainly in the subcutaneous tissue. They are mostly due to secondary infections of sebaceous cysts, or local soft tissue damage caused after trauma, or even hematoma formation. If not treated promptly and effectively, secondary infections can occur and pus can form. Therefore, it may also manifest as pus pockets, increased skin temperature, and significant pain. The patient will also have fever and there will be local fluctuation during body check, in which case surgical incision and drainage should be performed promptly. Since the abscess will not go away on its own, thorough drainage should be observed during surgery, together with anti-infection treatment and intermittent drug changes after surgery. It is also important to look for the root cause of the abscess, as some immunocompromised patients are also prone to this secondary soft tissue or skin infection, especially in diabetic patients, who should be actively monitored or controlled for blood sugar.