I have sprained both feet over the last 3 years, recently my feet hurt, especially the outer side of the feet, after sitting a while i struggle to walk for like 30 seconds, please advice?

See dr: You might have some instability in your ankles due to incomplete healing of the strained and/or torn ligaments in your ankles. See your primary dr and/or an orthopedic surgeon for evaluation. Might just need physical therapy to improve strength around your ankles.

I would advise: You see a foot and ankle specialist for an in person exam. Perhaps you havea longitudinal split in your peroneal tendon.....this is one of a few issues that are plausible etiologies for your problem.