Conditions

Labial fusion, also called labial adhesions, is when a girl's inner labia stick together along the midline.

These are two closely related conditions of the inner ear in which a person suddenly loses all sense of steadiness: the room starts to spin, nausea sets in…

Lactose is the sugar in milk. To absorb it, the small intestine has to produce an enzyme called lactase, which splits it into two simple sugars.

This is an uncommon condition in which the command travelling from nerve to muscle fails to get through properly.

The larynx is the short stretch of airway between the throat and the windpipe, and the vocal cords are stretched across the inside of it.

Laryngitis means inflammation of the voice box and, in most cases, swelling of the vocal cords.

A lazy eye, or amblyopia, is when one eye sees less well than the other not because of any disease of the eye itself, but because in the earliest years of…

A cramp is a sudden, involuntary tightening of a muscle that you cannot release by willpower.

This is a severe pneumonia you catch from water rather than from another person. The bacterium Legionella multiplies in lukewarm pipework, hot water…

This is an infection caught from water, soil and animals: the leptospira bacterium is shed in the urine of rodents and livestock, reaches fresh water and damp…