My husband had knee stress fracture for no reason.His nerve L5 was affected.There was no trauma, he does not exercises, no issues with back hip.He did MRI and they did not show anything.After 2 spinal steroid shots he started walking and after 1 month his ankle started to swell same leg that had issues.
Hello, I have studied your case. Ankle swelling can be different from nerve compression. I think it can be ankle synovitis. In this condition there is collection of fluid in the ankle along with pain and difficulty in movement. Patient needs to get CRP, ESR and Ra factor to confirm the diagnosis. If there is any abnormality in these tests than he needs to take anti-inflammatory Chat Doctor.  Along with this he needs to take Hot water fomentation and elastocrape bandage. I hope this answer will be useful for you. Let me know if there is any other followup questions. Thanks