Telemedicine has evolved from early 20th century ideas of using radio to connect doctors and patients remotely. In the 1960s and 1970s, government and private organizations invested in research on telemedicine. There are three main types of telemedicine: interactive, store-and-forward, and remote patient monitoring using mobile devices. Telemedicine provides benefits like lower costs, improved access to care, and reduced infection risk. However, insurance coverage and protecting medical data are disadvantages. Teleconsultation allows specialists to consult without travel via electronic means. Major international organizations support telemedicine research and applications. Saudi Arabia has implemented telehealth applications like Sehhaty and Anat.