Hyperlipidemia is a condition characterized by excess cholesterol in the blood. There are two main types of cholesterol: LDL (bad) cholesterol which deposits in blood vessels, and HDL (good) cholesterol which helps remove excess cholesterol from the body. High LDL cholesterol can narrow blood vessels and increase the risk of heart disease. Hyperlipidemia is diagnosed through a lipid profile blood test. Lifestyle factors like a sedentary lifestyle, smoking, and genetics can increase cholesterol levels, while exercise, maintaining a healthy weight, and dietary changes can help control cholesterol.