a marble ball size puss filled,reddish and painfull lump has arised in the middle line of buttocks and waist also.It is very difficult to sit,kindly advise a solution.                                                                                         regards                                                                                       m s
Hi, You had a pain full lump in the middle of buttocks, and waist. Difficult to sit.  It is a boil, needs to be treated, If in the beginning they can be cured with medicines, if left UN treated they may still grow and become painful, and incision and Chat Doctor. If still UN attended they will open by itself, and to be treated with antibiotics, proteolytic, and painkillers.  So I advise you to consult a surgeon for treatment.  Thank you.