Hello and welcome to HCM,
Pain in the hip, knee, back and neck probably suggests a joint pathology or disease process affecting the joints.
There are number of diseases which affect the joints like
rheumatoid arthritis,
osteoarthritis, gout,
pseudogout etc.
You have mentioned that you sustained an injury in the knee due to meniscal tear.
This could be a reason for pain in knee joint.
However, there is no history of pain in other joints.
Thus, pain in other joints is probably due to a common pathological process.
Numbness is caused due to nerve related disorder.
Nerve disease can be due to
nerve injury, nerve compression, nerve degeneration etc.
The abnormal movements of the fingers could be due to nerve related problem.
You need to
consult a neurologist and orthopedician for clinical assessment, investigations and further management.
Thanks and take care
Dr Shailja P Wahal