Hello, Thanks for posting your worry on HCM You are having abscess due to local subcutaneous by bacteria ( such as staph, strep, pseudomonas etc) and will require appropriate oral antibiotics such as cloxacillin, lincocin etc to manage the microorganisms and followed by surgical incision and drainage of the pus to accelerate and improve healing. Pain killers will also be needed to manage your pain. At home, with assistance, you could use a dressing and betadine to apply pressure around the bump to expel the pus until it starts bleeding. Then you take oral antibiotics ( normally prescribed by a physician). So my advise is visit the ER ( drainage can be done at outpatient then you go home and only come back for daily dressing). Hope this helps Dr Nsah