What should you know about a PMR blood test?

Blood work may include measurements of red and white blood cells, platelets, kidney function, liver function, inflammation and other markers chosen for your symptoms. A result outside the reference range does not automatically identify a disease, while a normal result does not explain every symptom. Anaemia, kidney disease, coeliac disease, Crohn's disease and infections such as dengue fever, brucellosis or glandular fever may require different combinations of tests. The clinician interprets the pattern, timing and examination together.

Ask whether you need to fast, change any medicine or bring previous results; preparation depends on the tests requested. Tell the clinician about pregnancy, supplements, recent infections, travel and difficult blood draws. After the sample, keep the dressing in place as advised and drink fluids if you feel light-headed. Arrange follow-up to discuss the result rather than trying to diagnose yourself from a report. A repeat or additional test may be useful when symptoms and the first result do not match.

Seek urgent care for severe weakness, fainting that does not settle, chest pain, major breathing difficulty, confusion, uncontrolled bleeding or signs of severe dehydration. Contact the requesting clinician promptly if you have persistent fever, worsening pain, yellowing skin, blood in stool or new symptoms while awaiting results.

Which markers are being checked and why? Do I need any preparation? When will the result be reviewed? What would lead to a repeat test or another investigation?