Because in ancient times, diseases were thought to be caused by the curse of monsters, the profession of doctors has a lot to do with religions all over the world. In the west, the "doctor" symbolizes Asclay Pioz in Greek mythology (the image of Asclay Pioz on crutches is the symbol of WHO).
In ancient Greece, different classes were used for diagnosis and treatment, slave doctors worked for slaves (slaves were different from later slaves), and free citizens sought doctors from free citizens. Doctors are not noble (this is because the Roman ruling class is less than the slave class, and most doctors are captured because of the war).
In medieval Europe, the social status of doctors was improved. Because it is an important occupation related to human life, it has been given a special position in specialized technical posts. However, at that time, due to the influence of China's Confucianism, doctors' social status was equivalent to that of masons, which was considered as a menial job. The social status of North Korean doctors is often lower than that of senior prostitutes.
Doctors in India exist as the ruling class and only take care of people of noble descent. In Japan, doctors are called pharmacists and are closely related to religion. In the edo period, their social status depended on the samurai class.
After the Meiji Restoration in Japan, the doctor system was more perfect, and Chinese and Western medicine were integrated. Traditional Chinese medicine and western medicine in China, South Korea and North Korea still exist independently, but Chinese medicine is gradually decreasing, showing signs of being lost.