<s>[INST] Dear sir my son is suffering pain back of Ankle , and stiffed from Thai to ankle, while standing it is pain , whether is is sciatica or what and what is treatment , He is suffering last 3 months .Used pain relief medicine , Aurvedic etc but not cure , please advise [/INST] Hello, I read carefully your query and understand your concern. The symptoms seem to be related to arthritis. I suggest doing an x-ray and a rheumatoid Factor blood level for further evaluation. Meanwhile, I suggest to use anti-inflammatory medications such as Ibuprofen to relieve the pain. I also recommend cold compresses for local application. Hope my answer was helpful. If you have further queries feel free to contact me again. Kind regards!  Chat Doctor.  </s>