You don't need an anal examination to apply for a health certificate, but you need to check your stool routine. In addition, you don't need to eat or drink from the first night to the next morning when you apply for a health certificate. You need to take blood on an empty stomach for the corresponding examination, all in the morning, and wait for the results in two days.
Health certificate is a kind of health examination certificate. Generally speaking, people engaged in food business, cosmetics business and hair salons need to apply for health certificates.