My sister suffers from a kind of abscess at her backside, left above her coccyx. It is inflammatory and dolorous. She tried to make an incision by herself but it is not superficial enough. It is estimated 1,5x1,5cm. Today she went to see a dermatologist. He told her that he thinks it is more cystic than an abscess. he did not do an ultrasound of it. He does not want to make an incision but told her to take antibiotics (clindamycin 600mg 3 times a day). I am wondering whether this is the right form of treatment. what do you think? Julia (Germany)