Gastro-oesophageal reflux (acid reflux)
Gastro-oesophageal reflux is a condition where the lower oesophageal sphincter (the muscular ring at the lower end of the oesophagus) is abnormally relaxed and allows the stomach's acidic contents to flow back or 'reflux' into the gullet ... [... more]
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Giant cell arteritis
Arteritis means inflammation of the arteries and it is one of those conditions in which the body's own immune system appears to 'attack' it's own tissues, in this case the lining of the arteries of the body. These are collectively called ... [... more]
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Blood glucose levels
The blood sugar level is the amount of glucose (sugar) in the blood. It is also known as serum glucose level. It is expressed as millimoles per litre (mmol/l). Normally, blood glucose levels stay within narrow limits throughout the day: 4 to ... [... more]
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Glaucoma
Glaucoma is not one disorder but a range of conditions in which the pressure inside the eye becomes too high. This results in damage to the optic nerve at the back of the eye which can lead to loss of vision if left untreated. Glaucoma is one of ... [... more]
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Glandular fever (infectious mononucleosis)
Infectious mononucleosis, commonly known as glandular fever, is a viral infection, which is caused by the Epstein-Barr virus. The disease is, among other things, characterised by a sore throat, swollen lymph nodes and extreme fatigue. Young ... [... more]
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Gallbladder disease
The gall bladder is a small pear-shaped organ on the underside of the liver that is used to store bile. Bile is made in the liver and is stored in the gall bladder until it is needed to help the digestion of fat. Gallbladder disease is a common ... [... more]
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Genital herpes
Genital herpes is a contagious disease caused by the herpes simplex virus (HSV), which infects the skin and mucous membranes of the genitals and around the rectum. It is transmitted by physical and sexual contact. Herpes appears as redness and ... [... more]
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Genital warts
Genital warts are a sexually transmitted condition caused by the human papilloma virus (HPV). Genital warts can be flat with stalks, or cauliflower-like, and are most often seen on the genitals or the area around the rectum. Genital warts are ... [... more]
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Genitourinary diseases
These are conditions usually caused by infections that can affect the genital area and urinary system. Some infections are caught from another person, usually during sex. Other cases are caused when organisms (bacteria or yeast), which are ... [... more]
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Gilbert's syndrome
Gilbert's syndrome is a finding, not a disease. It is found in about 5 per cent of the population and is due to raised levels of a natural pigment called bilirubin in the blood. Bilirubin is the natural waste product the body produces in the ... [... more]
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Parathyroid gland disorders
Most people have four small glands in the neck - two on either side - usually situated near the thyroid gland. They are too small to be seen or felt and have no functional connection with the thyroid but they adjust the level of calcium in the blood. [... more]
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Glue ear (secretory otitis media)
Glue ear is a condition in which fluid builds up behind the eardrum. It can interfere with a child's hearing, although this is often temporary. Many cases get better without any treatment. Children under the age of seven (with the highest risk at ... [... more]
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