Blood tests vary from reasonably simple to extremely complex, extremely reliable to extremely variable and requiring no further action (as in your case) to requiring multiple possible further decisions.

Understanding the results of multiple medical blood tests requires some knowledge of multiple subjects including biochemistry, chemical pathology, microbiology and immunology.

There's also the question of what to do next - do you repeat the test, get additional blood tests, get other tests (such as radiology or biopsies) and most critically do you actually have a diagnosis and do you need treatment? (If so, what?)

Then there's the issue of false positives and false negatives which most people get wrong (especially if you're in a low prevalence population).

The doctor needs to be involved because there's no guarantee that things will be normal.

Also depending on the test you may or may not understand what "normal" means.

Here's a quick test - These are some of the most commonly ordered blood tests: Which of these tests would you be happy to interpret yourself?:

- CBC (Including HB, platelets, differential blood count, neutrophils, leucocytes)

- Urea and electrolytes (Sodium, potassium, urea, creatinine, U/Cr ratio, chloride, bicarbonate, Anion gap)

- Liver function tests (ALP, AST, ALT, CBr, UBr) If abnormal - Hepatitis serology (including HBsAg, anti-HBc, IgM anti-HBc, anti-HBs)

- CMP (Free calcium, bound calcium, protein, magnesium, phosphate)