What should you know about a full panel blood test?

A clinician may request a full blood count to examine red cells, white cells and platelets, alongside tests of inflammation, kidney function, glucose, thyroid activity or nutrient levels. Each result has a different role, and an unusual value may have several explanations. Blood work helps direct the next question; it does not replace an examination or automatically identify a condition.

Low red-cell measures can occur with Anaemia. Kidney markers may lead to evaluation for Chronic Kidney Disease. Depending on symptoms and travel or food history, testing may also be considered for Brucellosis, Dengue Fever or Glandular Fever. Ongoing digestive symptoms may prompt assessment for Coeliac Disease or Crohn's Disease, while persistent exhaustion needs a broader review that can include Chronic Fatigue Syndrome.

Check whether fasting is required and ask if regular medicines should be taken before the appointment. Tell the clinician about supplements, recent infections, travel, menstrual bleeding and changes in weight or appetite. Drink water unless you were told otherwise. Ask which results will be available first and whether a repeat sample or a more focused test is planned.

Seek urgent help for severe breathing difficulty, chest pain, fainting, heavy bleeding, new weakness, severe dehydration or rapidly worsening illness. Contact your clinician promptly for persistent fever, unexplained bruising, marked weakness, blood in stools or urine, or symptoms that are interfering with eating, drinking or daily activities. A blood test should not delay care when symptoms are severe.

Which tests are included in my panel and why? Do I need fasting? Could a medicine, supplement or recent infection affect the result? Which findings need action, and when will we review them? What symptoms should make me seek help sooner?