In general, acne patients do not easily develop scar nodules after proper treatment. The occurrence of scar nodules is mostly related to one's constitution, such as a scar-prone constitution. Some patients have larger, more severely infected acne, and improper treatment can lead to further infection, resulting in hypertrophic scarring after healing. Treating scar nodules can be quite troublesome; the most common approach is still local medication and injections, usually two to three sessions, after which the scar nodules gradually shrink, soften, and become smaller, but they do not completely disappear. If the hypertrophic scarring is not very prominent, one can visit the dermatology department of a reputable hospital and use fractional laser treatment for repair, but no matter which method is employed, it is not possible to perfectly resolve the issue.