A pimple that grows after mixed hemorrhoid surgery may be due to a recurrence of hemorrhoids, or it may be due to a perianal abscess or sebaceous cyst. 1. recurrence of mixed hemorrhoids: after the mixed hemorrhoid surgery, if the causes of mixed hemorrhoids still exist, such as constipation, sedentary, etc., the mixed hemorrhoids may recur, and the pimple may appear again in the anus. 2. Perianal abscess: after the occurrence of perianal abscess, pimples will appear around the anus, the local redness and swelling, the patient will feel pain, local pressure and pain, but also can touch the fluctuating sense. 3. Sebaceous cysts: due to the blockage of sebaceous glands, there will be localized bumps, bumps protruding from the surface of the skin, and there are often black spots in the center. It is recommended that patients go to the hospital, can improve the ultrasound and other tests, usually can clarify the cause, and then can be dealt with accordingly.