Hello welcome to Ask A Doctor service. I have reviewed your query and here is my advise. Yes for your ankle pain ligament tear has to be ruled out. Muscle strain or underlying fracture also can be possibility. Non steroid antinflammatory drug like Naproxen can be prescribed until you investigate with x ray of ankle. According to x ray report your further management will be decided. I suggest you to consult orthopedic surgeon for examination. Hope I have answered your question. Let me know if I can assist you further.