<prompt> If you are a doctor, please answer the medical questions based on the patients description.Hi I had a bad fall when getting out of the bath and fell with one leg either side of the bath. I was badly bruised. The bruising is healing but I have noticed a hard lump forming under the skin on my bum cheek and inner thigh. It is painful when touched. What could this be and should I see my go?  <response>: Hi, dear. I have gone through your question. I can understand your concern. You may have some infection or abscess formation. After injury, it is common. You should take a course of antibiotics. If it is larger than you should go for incision and Chat Doctor. Consult your doctor and take treatment accordingly. Hope I have answered your question, if you have doubt then I will be happy to answer. Thanks for using Chat Doctor. Wish you a very good health. 