How long it takes for a white head of acne to come out and fall off on its own will depend on the severity of the acne. There are two types of acne whiteheads, one is whitehead acne, which is a white pimple formed due to clogged pores; the other is whiteheads on top of red inflammatory acne, which should actually be called pusheads, a white purulent discharge formed due to heavier infection. In the case of whiteheads, the pimples will only fall off on their own when the keratinized material in the pores naturally cures and hardens, a process that takes about a month, or more. If it is a pus head, you need to wait for it to swell to a certain degree and then rupture on its own, after the purulent secretion flows out on its own, the pimple can only get better, this time is relatively short, it takes about 2-3 weeks. The white head of the pimple should not be squeezed after it comes out, otherwise it will easily cause bacterial infection, which can cause intracranial infection in serious cases. Most of the acne on the face is caused by endocrine disorders, such as irregular life and frequent late nights. In daily life, you need to maintain good living and eating habits, do not stay up late, try not to eat too sweet, greasy stimulating food, keep your mood happy.