You cannot know what is abnormal until you know what is normal for you. Getting a health check when you are young provides a "baseline" health fingerprint. If your blood pressure naturally runs at 105/65 and five years later it is 125/80, that is a significant change even though it is technically "normal." Without that baseline, your doctor may miss the trend.
Diseases do not happen overnight. Atherosclerosis (plaque in the arteries) begins in childhood. Type 2 diabetes has a 10-to-12-year "prediabetic" phase. A proper health check identifies these biomarkers before the disease crosses the threshold. During the prediabetic stage, lifestyle changes alone can reverse the condition completely. Once diabetes develops, it is largely irreversible. health check
This is the most common psychological barrier. However, knowledge is power. A disease detected early via a health check might require a pill and a lifestyle tweak. A disease detected late might require surgery, chemotherapy, or a shortened lifespan. The bad news doesn't get better with age; it only gets worse. You cannot know what is abnormal until you