Conditions

Sepsis is a life-threatening condition caused by the body’s extreme response to an infection, which can lead to organ failure if not treated promptly.

Septic arthritis is a serious type of joint infection. It should be treated as soon as possible. You can make a full recovery with treatment but if left untreated it can be more serious.

Sexually transmitted infections (STIs) are infections passed through sexual contact. Many cause mild or no symptoms but can lead to serious health problems if left untreated.

Shin splints is a type of shin pain, usually caused by exercise. It's not serious and there are things you can do to help get better.

Shingles is a viral infection caused by reactivation of the varicella-zoster virus, leading to a painful rash and blisters. It mainly affects older adults and people with weakened immune systems.

Short-sightedness (myopia) is a very common eye condition where you cannot see objects far away clearly. It's usually corrected with glasses or contact lenses.

Shoulder impingement is where a tendon inside your shoulder swells and rubs against tissue or bone, causing pain as you lift your arm. It can be caused by irritation, injury or "wear and tear". It usually gets better in a few weeks or months.

Sick building syndrome is the name for symptoms you get while you're in a particular building. It usually happens in an office, but you can get it in any building.

Sickle cell disease is the name for a group of inherited health conditions that affect the red blood cells. The most serious type is called sickle cell anaemia.

Silicosis is a long-term lung disease caused by inhaling large amounts of crystalline silica dust, usually over many years.