Puncturing the anus with a health certificate is to check whether your intestines are infected with infectious diseases, such as bacillary dysentery. Generally, it is not the doctor who is stabbed, but you use the equipment provided by the hospital yourself.
It is not easy to hit by hand, for reference only.
I hope it helps you.
For your health, please rest as much as possible.
Eat normally, exercise properly, and quit bad habits.
Health is the greatest wealth in life.