Hello and welcome to HCM
First of all you require a MRI of the knee.
The symptoms that you have mentioned indicate that there is injury
to one of the structures in the knee joint known as cruciate ligaments.
The knee joint has various ligaments. There are a pair of ligaments, anterior cruciate ligament
runs from front to backward; posterior cruciate ligament
that runs from back to front. It is attached to the femur
(thigh bone) and the tibia
These are a pair of circular cartilages on the tibia (leg bone). These cartilages act as a cushion during movement of the knee joint.
According to the symptoms there is injury to the cruciate ligaments.
The management includes phsiotherapy and arthroscopic correction of the tear.
Thanks and take care
Dr Shailja P Wahal