<s>[INST] I noticed swelling in my left leg today. In the chin area and the side of the leg. I also have 6 or 7 bruises or skin discoloration below the skin...in the area when the swelling occurred. The bruising and skin discolorations almost form a C . Is this cause for concern? [/INST] Hello, It looks from your details that it can be due to following reasons:- Injury to your leg-Due to some medicines like anticoagulant (like heparin)- Due to clot formation in your veins will advise you the following to have relief:- Check for any medicines you are taking for bleeding tendencies-Apply an ace bandage from foot to above knee-Consult to your doctor and get investigated for clot in veins if any other above reasons do not fit with your symptoms. Hope I have answered your question. Let me know if I can assist you further.  </s>