Hello,
What you seem to be having is a boil. Boils are caused by infection of the hair follicle by staph aureus. Hair follicles that are blocked by greasy creams, petroleum jelly, or similar products are more vulnerable to infection. Bacterial skin infections can be spread by shared cosmetics or washcloths, close human contact, or by contact with pus from a boil or carbuncle. Treatment includes antibiotics and please do not touch or pick them up.
You should continue taking the antibiotics that your doctor has prescribed for you. If the symptoms persist then pus culture from the boils can be done and specific antibiotics prescribed.
I hope that helps. Please do keep me posted on how you are doing or if you have any additional queries. Kind regards.
Yes....staph can make huge pus pockets. Google i.