What does a hard swollen flat mass below the tail bone indicate?
Patient: red, hard swollen flat mass below the tail bone with one big red blotch in the middle. i get a rash there often in summer because of wearing wet bathing suits but this time, it s not that. it appearred yesterday and is bigger and more awkward to sit down comfortably Doctor: Hello,  As I find the history to be directing towards important thing is you have a gluteus muscle weakness due to which there is excessive pressure over the sacrum region. When the pressure is applied again and again there will be a beginning in the physiology of the skin tissue and the changes in the form of swelling, bruising, wound etc.   Doing exercises for the gluteus muscle strengthening should be good and also using piles pillow to avoid excessive weight transferring over the sacrum. The icing is also a good thing to allow healing.  Hope I have answered your query. Let me know if I can assist you further.  Regards, Jay Indravadan Patel, Physical Therapist or Physiotherapist