Hello. Thanks for writing to us at healthcaremagic Since the cyst seems to be infected I would suggest a week of an oral antibiotic for the infection to resolve. My choice of oral antibiotics would be either flucloxacillin Or cepahlexin. Once the infection resolves, Sebaceous cyst is best removed in its entirety along with the cyst wall, under local anesthesia. Popping the cyst with a needle Or squeezing Or manipulating in any other way is not recommended because it might introduce infection thereby causing the cyst to become painful. Moreover the cyst would reform itself if it is not removed entirely along with its lining wall because the lining wall contains sebaceous glands which secrete all there contents into the cyst and would cause the cyst to reform. I would suggest that you visit a general surgeon in your region for the needful. Regards