Black sitting marks on the buttocks may be a normal phenomenon, it is recommended to improve the bad habits, if necessary, give drugs or through laser treatment. 1. Change bad habits: long-term sedentary lead to local skin pressure, prone to chronic inflammatory reaction, resulting in local pigmentation. It is recommended to change bad habits, do not sit for a long time, usually increase the amount of exercise, can promote local blood circulation, is conducive to improve the symptoms. 2. Medication: The local stratum corneum is relatively thick, if necessary, can be given Vitamin A acid ointment, polysulfonic acid mucopolysaccharide ointment topical application, can soften the keratin, promote metabolism, can help improve the symptoms. 3. Laser treatment: if you can’t improve through the above ways, go to the general surgery department or dermatology department of the hospital if necessary, and irradiate the local area through laser, which can quickly eliminate the sitting mark. The black sitting marks on the buttocks generally do not affect the health of the body. If there is a need for treatment, it is recommended to go to the hospital, combined with the doctor’s advice for treatment.