Conditions

Chronic traumatic encephalopathy (CTE) is a brain condition thought to be linked to repeated head injuries and blows to the head. It slowly gets worse over time and leads to dementia, but the right help and support can manage the symptoms.

Cirrhosis is a condition where the liver is severely damaged. It can be life-threatening, but treatments and lifestyle changes can help stop it getting worse.

A cleft is a gap or split in the upper lip and/or roof of the mouth (palate). It is present from birth.

Clostridioides difficile (also known as Clostridium difficile, C. difficile or C. diff) is a type of bacteria that can cause diarrhoea. It often affects people who have been taking antibiotics. It can usually be treated with a different type of antibiotic.

Club foot (also called talipes) is where a baby is born with a foot or feet that turn in and under. Early treatment should correct it.

Cluster headaches are severe attacks of pain that can last for long periods. They're not caused by another illness. They can have a real impact on your life, but there are treatments that can help.

Coeliac disease is a condition where your immune system attacks your own tissues when you eat gluten. This damages your gut (small intestine) so your body cannot properly take in nutrients.

Cold sores are common and usually clear up on their own within 10 days. There are things you can do to help ease the pain.

Colic describes episodes of severe, often unexplained abdominal pain. In babies, it causes prolonged crying and distress despite otherwise normal health.

Colour vision deficiency (colour blindness) is where you see colours differently to most people, and have difficulty telling colours apart. There's no treatment for colour vision deficiency that runs in families, but people usually adapt to living with it.