Someone slid into me hitting my calf rather hard, it wasn't bad at first but as the day went on i began to limp a little and now there is a pretty solid knot. (tender to the touch and when walking can feel pain), i cannot see any bruising. what is the knot or what happened?
HiIt is a haematoma caused due due to blunt trauma injuring some local blood vessel in that areaYou can go for cold compression on the area. If is very painful or extending,  with compression please contact a general surgeon to get treated.By then please start with pain killers combined with seratiopeptidase or chymoral forte to rrduce yhe pain  &  swelling. All the best Take care