Screening vs diagnosis
A diagnostic test looks into symptoms someone already has. A screening test checks people without symptoms. Common examples include blood-pressure checks, blood-sugar and cholesterol tests, and some cancer screenings.
Why recommendations differ
Which screenings are recommended, and how often, depends on age, family history and other risk factors. National programmes and clinicians use these to decide who benefits most.
Questions to ask
- What is this test looking for, and why is it recommended for me?
- What happens if the result is positive — what are the next steps?
- Are there any risks or downsides, such as false alarms?
- When should I be screened again?
A screening result is not a diagnosis; a positive result usually means more tests to find out.
Sources
- Health Screening — MedlinePlus — U.S. National Library of Medicine. Checked 2026-09-26.
Editorial update: 2026-09-26.
Medical disclaimer: this is a source-linked educational summary, not individual medical advice, diagnosis, prescription or interpretation of personal results. For severe or rapidly worsening symptoms, call 115.
Antopeloni — plain-language health education from public sources, part of the ZIBADIS network founded by Masoud Moghaddam.
