Medical tests are procedures used to diagnose, monitor, or screen for health conditions. They can include blood tests, imaging studies like X-rays or MRIs, and physical examinations. These tests help healthcare providers gather important information about a patient's health and determine the best course of treatment. The results of medical tests can reveal the presence of diseases, assess the effectiveness of treatments, or identify risk factors for certain conditions. Regular screenings, such as cholesterol or blood pressure checks, are essential for maintaining overall health and preventing serious illnesses.