Hello. Thank you for writing to us The fact that it has pus in it I suggest a possibility of bacterial skin infection/ folliculitis Or a furuncle. I would suggest you to use an OTC topical antibacterial e.g 2% mupirocin ointment, twice daily for a few days. Topical antibiotic alone may be effective for a single lesion which has already drained, however, if the lesion grows Or becomes more painful a course of an Oral antibiotic may also be simultaneously started. My choice of oral antibiotic would be either flucloxacillion Or cephalexin for a week. Oral antibiotics are prescription drugs and therefore I suggest that you visit a doctor for the needful. Regards