Doctors usually wear white coats and surgical gowns during surgery, and the gowns are usually blue or green, but many people are curious as to why doctors wear their surgical gowns backwards.

The purpose of the surgical gown is to isolate the sterile and aseptic, and the operation is sterile in front, so the design of the clothes should be tied at the back, and the surgical patient wears the same clothes as the doctor wears, so it is reversed.

Before the 20th century, European and American doctors were dressed as gentlemen. Wearing towering bowler hats and gray gowns, they walked through the early hospitals.

At that time, the concept of modern microbiology and sterilization had not yet been established, the doctor's dress is entirely to "protect themselves" - to avoid blood, dust and other contamination of the clothes hidden under the robe. The gray gown also made stains less visible.

In medieval Europe, doctors would also wear "beak masks", a head-to-toe gray or black robe, look a little scary, but is a testimony to the history of mankind's struggle with the plague.

The white coat has been worn by doctors for just over a hundred years and is considered a symbol of "cleanliness and neatness".