must be controlled beyond any shadow of doubt.
Pain in legs is a common condition.
Do hot fomentation keep a pillow under the legs at night &/when resting.
Any way take caldikind
plus (mankind) 1tab odx10days paracetamol
250mg od & sos x 5days
do knee exercises
it may have to be further investigated
make sure you are not allergic to any of the medicines you are going to take.