What causes sore red lump on the back of the thigh?
Patient: I've woken up with a red lump on the back of my thigh, it has a dark centre (almost looking as if blood is trapped under the skin) and is sore to touch...I was wondering if anyone could tell me what this could be and whether I need to go to the doctors or if it will disappear on its own. Doctor: Hi,This could have been caused by an insect bite. As you describe it as painful and red, I think it may be infected and there is a risk you may develop cellulitis. Therefore, I suggest you go to the ED for assessment and possible antibiotics. Regards,Dr K A Pottinger