Sebaceous cysts may lead to rupture if not treated properly. It should be treated in a timely manner in a hospital, and the treatment includes medication and surgery. Sebaceous cysts are mostly formed when the sebaceous gland ducts are blocked and the contents of the glands accumulate. As sebaceous cysts are rich in sebum and other nutrients, it is very easy to cause bacterial growth and infection, and untimely treatment can lead to ulceration, with pus or tofu dregs-like foul-smelling material flowing out. 1. Medication: When infection occurs and causes sebaceous cysts to rupture, often accompanied by infection, doctors will give medication, including gold cream, mupirocin ointment, erythromycin ointment and so on. 2. Surgery: When infection occurs and the sebaceous cyst breaks down with pus or tofu dregs-like foul-smelling material coming out, the doctor will carry out surgical treatment for sebaceous cysts, stripping the cysts intact and clearing the wound to drain, and change the medication on a regular basis. Patients should go to the hospital in time, do not blindly treat themselves, so as not to delay the condition or cause adverse reactions.