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Medical tests: why are they needed and which ones are the most important
Why are medical tests needed?
Medical tests are one of the easiest ways to look inside your body without complicated procedures. They help detect problems that don’t yet have symptoms, assess the effectiveness of treatment, or confirm a diagnosis. Test results are often the starting point for your doctor’s further decisions. They’re like a map for a driver — it’s hard to stay on track without one.
What are the tests?
Analyses are conventionally divided into several main groups:
General clinical — complete blood count, urine, feces. They give a basic picture of the state of the body.
Biochemical — evaluate liver and kidney function, metabolism, glucose and cholesterol levels.
Hormonal — help detect endocrine system disorders (thyroid gland, sex hormones, etc.).
Infectious — PCR, ELISA, rapid tests for viruses, bacteria, parasites.
Immunological and allergological — show how the immune system works and whether there are any allergies.
Tumor markers — special proteins or substances that can be a signal of an oncological process.
When to take tests
Preventively - once a year (even without complaints)
Before starting new medications
When planning pregnancy or surgery
When new symptoms appear (weakness, pain, weight loss, fever)
If you have chronic diseases - to monitor the dynamics
What do the basic analyses show?
| Analysis name | What helps to detect |
|---|---|
| Complete blood count | Inflammation, anemia, infections |
| General urine analysis | Condition of the kidneys and urinary system |
| Blood biochemistry | Liver, kidneys, sugar levels, cholesterol |
| Thyroid hormones | Hypo- or hyperfunction |
| Glucose analysis | Diabetes mellitus |
| PCR for infections | Viral or bacterial pathogens |
| Tumor markers (e.g. CA-125) | Risk of oncological pathologies (auxiliary) |
How to prepare for tests
Most tests are taken on an empty stomach.
The day before the test, avoid fatty foods, alcohol, and physical activity.
Before hormone tests, consult your doctor about the day of your cycle.
It is important to inform the laboratory about any medications you are taking - they may affect the result.
References to sources
Mayo Clinic – Routine blood tests
FDA – Lab tests explained
Regular diagnostics are not only a way to find a disease, but also an opportunity to make sure that everything is fine with the body. Tests are a simple, affordable and effective step towards a long and healthy life.
