<s>[INST] Hi, I ran a marathon today and at around mile 7, the side of my right leg started hurting, from about the ankle to the mid calf. I ran the rest of the marathon after that, so about 19 more miles, and now I see that there is a bruise there. Was that most likely the problem all along? Or is it possible that I injured something and then running 19 miles on it caused a bruise? [/INST] Hello, The causes of pain and bruise in legs are:1. Sprain2. Overuse3. Injury4. Blunt trauma5. DVT (Deep vein thrombosis)6. Vascular diseases that, you can take tablet Broken. Apply diclofenac gel or cream. Also, apply ice locally with thrombophob gel locally and do color Doppler of legs. Treatment mainly depends upon underlying conditions. Kindly follow with detailed history or consult with orthopedic. Hope I have answered your query. Let me know if I can assist you further. </s>