The mechanism of acne is firstly due to the increase in androgen level, which causes an increase in sebum secretion, and the increased sebum is not discharged properly due to the keratinization of the sebaceous ducts, which in turn forms acne. Once the inflammation of acne increases, it becomes inflamed and forms red papules or even pustules, or in some cases, cysts with blood or pus secretions. If squeezed, some yellow water or plasma may be squeezed out. It is not advisable to squeeze, but to go to a regular hospital and let the acne absorb itself through anti-inflammatory treatment. If squeezing causes the spread of inflammation and aggravation, it may increase the risk of scarring.