Blood sampling is a medical procedure used to collect a small amount of blood from a patient for testing. This process helps healthcare professionals diagnose conditions, monitor health, and evaluate the effectiveness of treatments. Blood can be drawn from various sites, commonly from a vein in the arm or a fingertip. The collected blood is then sent to a laboratory for analysis. Tests can measure different components, such as red blood cells, white blood cells, and glucose levels, providing valuable information about a person's health. Proper techniques and hygiene are essential to ensure accurate results and minimize discomfort for the patient.