Understanding joint health
A short introduction to how joints work and why they can hurt.
How a joint works:
- Cartilage covers the ends of the bones so they glide smoothly
- Ligaments hold the joint steady; tendons connect muscle to bone
- The joint lining makes fluid that helps the joint move
Common sources of joint pain:
- Osteoarthritis: changes in the cartilage, bone and lining of the whole joint
- Tendon problems: often from overuse or repeated strain
- Injury: ligament, meniscus or cartilage damage
- Inflammation: for example from rheumatoid arthritis or gout
- Referred pain: pain felt in one place but coming from another (e.g. neck to shoulder, back to hip)
Good to know:
- Cartilage has a limited ability to repair itself because it has no direct blood supply
- Scan findings and pain don't always match: some people have visible changes with little pain, and the other way round
- For osteoarthritis, tailored exercise is a core part of care in international guidelines