<s>[INST] Last night, I was not very stretched out and did the side splits, and heard a very big popping noise. It hurt really bad and this morning I can still barely walk and the pain is still persistent. It s at the top of my inner thigh toward the back. What should I do? [/INST] This is sever muscle contusion which need rest and cold panding regularly. You should start use topical and oral non steroidal antiinflammatory with muscle relaxant driugs 3 times daily for 2 weeks. </s>