Conditions

HIV (human immunodeficiency virus) is a virus that weakens your immune system and increases your risk of serious illness. There’s currently no cure, but with treatment most people with HIV can live a long and healthy life.

Haemochromatosis is an inherited condition where iron levels in the body slowly build up over many years.

Haemophilia is a rare condition that affects the way your blood clots, meaning you bleed more easily than other people. It cannot usually be cured, but treatment can help control your symptoms.

Haemophilus influenzae type b (Hib) is a type of bacteria that can cause life-threatening infections. Babies and children are most at risk of getting seriously ill and can get vaccinated against it.

Many hair dyes contain ingredients that can irritate your skin or cause an allergic reaction.

Hamstrings are the muscles at the back of your thighs. You can injure them when playing sports or exercising. You can usually treat mild injuries yourself.

Hand, foot and mouth disease is a common childhood illness that can also affect adults. It usually gets better on its own in 7 to 10 days.

Hay fever is a common allergy that causes sneezing, coughing and itchy eyes. You cannot cure it, but there are things you can do to help your symptoms, or medicines you can take to help.

Most head injuries are not serious, but it's important to get medical help if you or your child have any symptoms after a head injury. You might have concussion (temporary brain injury) that can last a few weeks.

Head lice and nits are very common in young children and their families. They are not caused by dirty hair and are picked up by head-to-head contact.