According to your History it seems like Some inflammatory conditions in your joints, after fever due to 'aama'i.e toxins or May be reactive arthritis.
We need some tests to do and find out the cause of it.And proper clinical diagnosis to treat the condition accordingly.
Is this condition you faced earlier also?
Your appetite?
Your blood reports? What is the status of ESR ,
CRP ,
LFT , CBC, HLA B-27, RA FACTOR, ANA etc?
Next Steps
You can take Sunthi Churna 2gram with luke warm water before meals.
Do 'Langhan' fasting that is take your evening meal at around 6:00pm then next meal around 8:00am next day.
Take Sand half part and Saindahv Salt half part heat it in a pan without any oil or anything. Put it in cotton cloth and do hot fomentation on your joints without pressing deeply , avoid to put it for too long as Sand has high heat storing capacity.
Sudarshan Churna will be beneficial but proper clinical examinations Reports etc are needed for it, do not start it without proper consultation.
Health Tips
Avoid Refined flour, refined oils, Besan , Bakery products, Milk products like paneer, khoya , chena etc.
Try to keep yourself healthy do light exercises for atleast 10-15 minutes initially then increase time accordingly.