Conditions

Stillbirth is the loss of a baby before or during birth after 24 weeks of pregnancy. It can occur for many reasons and requires medical and emotional support.

Stomach cancer is a malignant tumour that develops in the lining of the stomach. Symptoms may include indigestion, weight loss, and persistent abdominal pain, often appearing at later stages.

Stomach ulcers (also called peptic or gastric ulcers) are sores in the stomach. They can be serious, but most people recover with treatment.

Strep A infection is caused by group A Streptococcus bacteria and can lead to illnesses such as sore throat, scarlet fever, or skin infections. In rare cases, it may cause serious invasive disease.

Stretch marks are very common. They're harmless and often get less visible over time.

A stroke is when blood stops flowing to a part of your brain. It can affect things like speech and movement, and take a long time to recover. A stroke needs urgent medical help in hospital because it can be life-threatening.

A stye is a small, painful lump on the eyelid. They're common and should go away within a week. Styes are rarely a sign of anything serious, but may be painful until they heal.

A subarachnoid haemorrhage is a rare but life-threatening type of stroke that needs emergency treatment. Find out about the symptoms, causes and recovery.

A subdural haematoma is bleeding inside the brain usually caused by a head injury. It can be very serious and usually has to be treated with surgery.

Sudden infant death syndrome (SIDS) – sometimes known as cot death – is the sudden, unexpected and unexplained death of an apparently healthy baby.