Two of the most common causes of hip or knee pain are osteoarthritis and inflammatory arthritis. Both will reduce mobility and independence over time.
The American College of Rheumatology and the Arthritis Foundation do not recommend health supplements such as glucosamine in treating knee pain.
Most cases of back pain are caused by muscular strain, but in rare cases, unremitting back pain can be a sign of more sinister health issues.
Patients above age 40 with persistent knee pain should see an orthopaedic surgeon to see if they need medical treatment for knee osteoarthritis.