Urate blood test: what to know

Urate is produced when the body breaks down purines, substances found in cells and some foods. The kidneys normally remove it in urine. A raised result may occur when the body makes more urate, removes less through the kidneys, or responds to medicines, dehydration, or another illness. It can support assessment of gout or kidney problems, but a result alone does not prove that joint pain is gout and a normal result does not explain every symptom.

Doctors may consider the result with joint swelling, kidney function, urine findings, medicines, alcohol intake, and conditions such as chronic kidney disease. Other illnesses, including anaemia, coeliac disease, Crohn's disease, dengue fever, brucellosis, or glandular fever, require different tests and cannot be diagnosed from urate alone.

Ask whether you need to fast and whether regular medicines should be taken as usual; preparation varies with the wider group of tests being ordered. Drink normally unless you have a fluid restriction. Tell the clinician about gout medicines, diuretics, kidney disease, recent illness, and supplements. Do not start or stop treatment based on one result without discussing the clinical context.

Arrange review for a hot, swollen, very painful joint, especially with fever or feeling unwell. Seek urgent help for severe weakness, confusion, breathing difficulty, chest pain, or signs of serious infection. If a result is unexpectedly abnormal, ask the requesting clinician what should happen next and whether repeat testing or kidney assessment is appropriate.

Ask why the test was ordered, what your result means for your symptoms, whether medicines or hydration could have affected it, whether kidney function needs checking, and when follow-up is needed.