Health A to Z

Most health pages tell you what a condition is. Very few tell you what it is like to sit beside somebody who has one. This library does both. Search by name, or by the name you know it under.

Important: This page is general information, not medical advice, and it is not a diagnosis. If you are worried about your health or someone else's, speak to a GP, pharmacist, or call 111. In an emergency, call 999.

500 conditions, showing 191–200 (page 20 of 50).

G

Gender dysphoria

Also called Gender incongruence

Distress from a mismatch between gender identity and sex assigned at birth. Waiting lists in the UK now run to years.

Genital herpes

Also called Herpes simplex, HSV

Extremely common, usually mild after the first episode, and carrying stigma far out of proportion to the illness. Dangerous only around childbirth.

Gestational diabetes

Diabetes appearing in pregnancy. Usually resolves after birth, and it is a warning about the next twenty years.

Giant cell arteritis

Also called GCA, Temporal arteritis

New headache over 50 with scalp tenderness or jaw pain. Untreated it blinds people, permanently, sometimes within a day.

Gilbert's syndrome

A harmless inherited quirk causing mild jaundice when unwell or fasting. Its main importance is not being mistaken for liver disease.

Glandular fever

Also called Infectious mononucleosis, Epstein-Barr virus, Mono

A viral infection whose fatigue outlasts everything else. And there are two things you must not do while you have it.

Glaucoma

Pressure damaging the optic nerve. Painless, silent, and the sight it takes never comes back.

Glomerulonephritis

Also called Nephritis, IgA nephropathy, Inflammation of the kidney filters

Inflammation of the kidney's filters. Usually silent, and often found only because somebody tested the urine.

Goitre

Also called Thyroid swelling, Thyroid nodule

A swollen thyroid. Usually benign, and thyroid function tests may be entirely normal, which does not make the lump nothing.

Gout

Crystals of uric acid in a joint. Ferociously painful, entirely treatable, and still treated as a joke.