Hi, I have a sore hard lump under the skin just inside my bum crack. It s not very red and doesn t havea head but is extrmeley sore to sit, walk and lie down. I ve tried having hot showers and baths and this does nothing except increase the pain and throbbing.
Welcome to ChatDoctorThis is mostly skin abscess(pus) which needs Chat Doctor.  Also, antibiotics are required. See a surgeon for confirmation and surgery. Regards