Circulation refers to the continuous movement of blood throughout the body via the heart and blood vessels, delivering oxygen, nutrients, and hormones to tissues while removing waste products such as carbon dioxide. Healthy circulation depends on the proper function of the heart, arteries, veins, and capillaries, as well as balanced blood pressure and vessel integrity. When circulation is impaired—due to conditions such as atherosclerosis, peripheral artery disease, blood clots, diabetes, or heart disorders—symptoms may include cold hands or feet, numbness, swelling, muscle cramps, fatigue, slow wound healing, or chest pain. Poor circulation can lead to serious complications if untreated, including tissue damage or stroke. Maintaining cardiovascular health through regular exercise, balanced nutrition, smoking cessation, and medical management of underlying conditions is essential for optimal circulatory function.