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  • Atrial fibrillation - Complications

    People with atrial fibrillation are at increased risk of having a stroke. In extreme cases, atrial fibrillation can also lead to heart failure.

  • Atrial fibrillation - Causes

    The exact cause of atrial fibrillation is unknown, but it's more common with age and affects certain groups of people more than others.

  • Vitamin B12 or folate deficiency anaemia

    Read about vitamin B12 or folate deficiency anaemia, which occurs when a lack of vitamin B12 or folate causes the body to produce abnormally large red blood cells.

  • Skin cyst

    Find out about skin cysts, which are round, fluid-filled lumps under the skin. Read about the symptoms, treatments, types and causes.

  • Sjögren's syndrome

    Read about Sjögren's syndrome, which affects parts of the body that produce fluids, like tears and spit (saliva). Find out what the symptoms are, what causes it, how it's treated and advice about living with it.

  • Sickle cell disease

    Find out about sickle cell disease, a serious inherited blood disorder where the red blood cells develop abnormally. Find out about the symptoms, causes and treatments.

  • Schistosomiasis (bilharzia)

    Read about schistosomiasis, also known as bilharzia, an infection caused by a parasitic worm that lives in fresh water in subtropical and tropical regions.

  • Rheumatoid arthritis

    Read about rheumatoid arthritis, a long-term condition that causes pain, swelling and stiffness in the joints.

  • Reactive arthritis

    Reactive arthritis is a condition that causes inflammation (redness and swelling) in various places in the body.

  • Ovarian cyst

    Read about an ovarian cyst, a fluid-filled sac that develops on a woman's ovary. They're very common and do not usually cause any symptoms