Browse Conditions A-Z


Hair loss

Hair loss (or alopecia) refers to a condition which causes the sufferer to lose their hair. This is also known as baldness.

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Hay fever

Hay fever is an allergy, and it got its name because it is mostly prevalent during the hay making season when pollen is flying around and easily inhaled.

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A headache refers to any pain experienced in the head which could just be a temporary, such as migraine, neuralgia, sinusitis or any stress-related disorder. The headache could also be due to a head or neck injury, or to a more serious underlying health problem such as meningitis.

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Hearing difficulties

Hearing difficulties is an umbrella term for the whole spectrum of auditory disorders from just being unable to hear certain frequencies of sound to full hearing impairment or deafness.

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Heart disease

Heart disease is an umbrella term for a wide range of conditions that can affect the heart, such as:

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Heavy metal poisoning

Heavy metal poisoning can be caused by ingesting, inhaling or absorbing through the skin or mucous membranes the following metals or semi-metals: arsenic, bismuth, cadmium, iron, lead, mercury and thallium.

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High cholesterol

High cholesterol, or hypercholesterolemia, refers to the presence of high levels of cholesterol in the blood.

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Hives are a kind of skin rash that is raised, often itchy, red bumps on the surface of the skin.

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Hyperactivity is a state of too much muscle activity or where a particular part of the body is too active.

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Hyperglycaemia develops when there is too much blood sugar, or glucose, in the bloodstream; it is a symptom and cause of diabetes.

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Hypertension — which means high blood pressure — increases the risk of heart attacks, strokes, kidney failure and damage to the eyes. 

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Hypoxia means low oxygen, and is a state of oxygen deficiency in the body that is sufficient to cause an impairment of function.

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