Hello, this is normal. My friend's parents have double eyelids, and she has a single eyelid. This can only be said to be inherited from her parents' recessive genes. Let it be. It is really impossible to understand double eyelid surgery. Now that double eyelid surgery is very mature, there are several ways. You can perform surgery according to your own situation. If your eyelids are swollen, it is recommended to have a total liposuction.