Diseases & Health Conditions
Educational information about diseases, symptoms, and related treatments
Hydrocephalus
Hydrocephalus is a condition where fluid builds up in the brain. This excess fluid affects the brain...
Hyperglycaemia (high blood sugar)
Hyperglycaemia, or high blood sugar, can affect people with type 1 diabetes and type 2 diabetes, and...
Hypoglycaemia (low blood sugar)
Hypoglycaemia, also known as a "hypo", is when the level of glucose in your blood drops below normal...
Hypothermia (low body temperature)
Hypothermia happens when the body's temperature falls below 35°C, compared with a normal reading of...
Idiopathic pulmonary fibrosis
Idiopathic pulmonary fibrosis (IPF) is a condition where the lungs develop scarring over time, makin...
If your child has cold or flu symptoms
Cold and flu infections are extremely common in babies and children, and the good news is that most...
Impetigo
Impetigo is a common skin infection that causes sores and blisters. It spreads easily from person to...
Indigestion
About indigestion, causes of indigestion, diagnosing indigestion, treating indigestion, complication...
Infertility
Infertility means you are not able to become pregnant. Not everything on this page will apply to yo...
Inflammatory bowel disease (IBD)
Inflammatory bowel disease (IBD) is the name given to a group of conditions that affect the gut, and...
Ingrown toenail
An ingrown toenail is a common problem where the nail grows into the surrounding skin. It can be pai...
Inherited heart conditions
Inherited heart conditions, sometimes called inherited cardiac conditions (ICC), are a group of hear...
Insomnia
Insomnia is when you have trouble sleeping. It can mean struggling to get to sleep in the first plac...
Intoeing (pigeon toe) in children and young people
Your child's feet turn inward when they walk. Some people call this hen-toeing or pigeon toeing. It'...
Iron deficiency anaemia
About iron deficiency anaemia Causes of iron deficiency anaemia Diagnosing iron deficiency anaemia T...
Irritable bowel syndrome (IBS)
Irritable bowel syndrome (IBS) is a common, long-term condition of the digestive system. It is often...
Itchy bottom
Itchy bottom means your skin around the anus keeps feeling itchy, and you get a strong urge to scrat...
Itchy skin
Itchy skin can be annoying and uncomfortable, but in most cases it isn't a sign of anything serious....
Joint hypermobility
About joint hypermobility Diagnosing and treating joint hypermobility Joint hypermobility means so...
Kaposi’s sarcoma
Kaposi's sarcoma (KS) is a type of soft tissue sarcoma. It usually affects the: - skin - lining of t...
Kidney cancer
The kidneys are part of the urinary system. They filter waste from the blood and make pee. Kidney c...
Kidney infection
A kidney infection, also called pyelonephritis, is a painful and unpleasant illness. It happens when...
Kidney stones
Kidney stones can form in one or both kidneys, and they most often affect people aged 30 to 60. They...
Labyrinthitis
Labyrinthitis is an inner ear infection. It inflames the labyrinth inside your ear, affecting your h...