A-Z of conditions and treatments

Polycythaemia vera is characterised by the production of too many red blood cells, caused by abnormal function of the bone marrow.

Typical symptoms of polymyalgia rheumatica include severe muscle aches and stiffness, particularly in the neck, shoulders and thighs.

Polymyositis is hard to diagnose and may be mistaken for muscular dystrophy.

Polyps are common. A polyp is a small protrusion that grows out of the membranes lining various areas of the body including the nose, intestines and lining of the uterus (endometrium).

Porphyria can affect the skin, nervous system, gastrointestinal system or all of these, depending on the specific type.

PEP (post-exposure prophylaxis) is antiviral medication to prevent HIV infection. Learn what is PEP, what PEP is for, where to get PEP, important reminders about PEP and where to get help.

People with post-traumatic stress disorder often experience feelings of panic or extreme fear, which may resemble what was felt during the traumatic event.

Bad habits such as slouching and inactivity cause muscle fatigue and tension that ultimately lead to poor posture.

A feature of Prader-Willi syndrome is the child's excessive appetite, which often leads to obesity.

Pre-exposure prophylaxis (PrEP) is an oral medication to prevent HIV in people at risk. All about PrEP, what PrEP is for, dosage, where to get PrEP, PrEP side effects, PrEP health checks and support.