If a pimple is broken and pus appears, don’t squeeze it. A pimple is a medical sebaceous cyst, which is a common pathological change formed after the blockage of skin sweat glands and sebaceous glands. The sebaceous gland cells in the skin secrete oil, similar to bean dregs in the local blockage after the formation of cysts, if squeezed out, in addition to pus and residue under the skin, but also accompanied by bad odor, oil will generally be discharged from the body through the duct. However, if the secretion is greater than the discharge, the sebaceous gland cysts will be formed as more and more oil accumulates over time. If the abscess is squeezed, the normal physiological structure of the tissues around the abscess will be easily destroyed, which will lead to a chain infection and in serious cases, sepsis will be induced, endangering life. The sebaceous gland cells will keep secreting oil, which will not be cleaned, but will also make the skin red, swollen, and pus. The correct way is to go to the hospital under local anesthesia to have the cyst removed, and when there is pus, it needs to be cut and drained.