Acne can lead to infection if you pick it yourself with an acne needle, so you should avoid picking it yourself with a needle. The medical name for acne is sebaceous cyst, which is a cyst formed when the sebaceous gland’s excretory ducts are blocked and the sebaceous gland’s cystic epithelium is trapped and accumulated by gradually increasing secretions. Sebaceous cysts are characterized as slow-growing benign lesions. They can occur at any age and are most common on the head, face, neck and chest and back, and are more common in young adults. Sebaceous cysts protrude from the surface of the skin and are usually asymptomatic, but can be painful and pus-filled if secondary infection occurs. Sebaceous cysts are small and do not require special treatment, but it is important to remember not to irritate them by squeezing them with your hands, as this can lead to localized infections. If the local skin redness, swelling and pain should be timely to the hospital to let the doctor to check and deal with, can not use the needle to pick broken, when a short period of time to grow rapidly, also need to go to the hospital in time to let the doctor to check and treat. When the body appears powder tumor, please go to the hospital, under the guidance of the doctor for treatment, so as not to cause danger.