Medical tourism involves traveling to another country for medical treatment. Traditionally, people from less developed countries traveled to more developed countries for unavailable treatments, but now people also travel from developed to developing countries for lower costs. Reasons for medical tourism include obtaining illegal treatments in the home country or accessing rare disease experts. Risks include medical issues like blood clots. The process typically involves working with a medical tourism provider who helps with treatment and travel logistics. Popular destinations include Costa Rica, Greece, Mexico, Thailand, and India, which offers treatments at much lower costs than Western countries. Medical tourism is growing in India and could generate $5-10 billion in revenue annually by 2012.