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O

  • Oligoarthritis is the most common type of juvenile idiopathic arthritis (JIA) affecting about two-thirds of young people with arthritis.

  • Osteoarthritis is the most common form of joint disease. It causes joint pain and stiffness. We explain its causes, diagnosis and treatment, and the importance of self-help measures.

  • Osteoarthritis of the knee

    The knee is one of the joints most commonly affected by osteoarthritis. In this section we explain a bit more about what causes it and how it’s diagnosed and treated.

  • Lauging mature ladies sat on a park bench in the winter sunshine

    Osteomalacia

    Osteomalacia can cause bone pain and muscle weakness. It's often caused by lack of vitamin D. We explain a bit more about what causes it and how it’s diagnosed and treated.

  • Osteoporosis

    Osteoporosis is a condition that causes the bones to become fragile, so that they break more easily. We explain a bit more about what causes it and how it’s diagnosed and treated.

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