<human>: My brother in law hit his shin on a concrete step.  A huge knot popped up.  We put ice on it and it was down the next day.  There is a sore about the size of a quarter where he hit it.  We have treated the sore with medi-honey, and there is no fever.  However the entire shin from the site about 12 inches down is red.  No fever.  He is diabetic with congestive heart failure.
<bot>: Welcome to Chat Doctor .1. The symptoms seem like an infective feature.2. With underlying medical conditions like diabetes and cardiac pathology, I would recommend seeing the GP and let it get examined. 3. As in diabetics possibilities of infection are more.4. Muscle relaxant, and a course of antibiotic is what he needs according to me.5. But one needs to examine the area only then come to conclusion. Hope it helps you. Wish you a good health. Anything to ask ? Do not hesitate. Thank you.