A stent is a medical device used to treat blockages in the body. It is inserted into a blocked artery or vein and expands to relieve the blockage, allowing blood to flow freely. Stents are commonly used to treat coronary artery disease, peripheral artery disease, and other conditions that cause blockages in the body. Stents are made of metal or plastic and can be permanent or temporary. They are an effective blockage reliever and can help improve quality of life for those suffering from blockages.