Is it necessary to have skin excision?

This is my first double eye surgery...
 The hospitals I went to at the beginning of my development said that my eyes needed eye correction, but the hospitals I went to later told me that I had pseudoptosis, which was caused by sagging eye skin.
 However, at both hospitals, I would need to make incisions and remove a bit of skin. He said it was the same, but one hospital said that it would be okay to just remove the fat, saying that they don't do the excision carelessly. Maybe it's because
 I'm still young, but I don't know what will happen later... I also think it would be better not to do the skin excision, but on the other hand, It bothers me that if I don't do skin excision, the sagging skin won't be removed, so my double eyelids won't come out pretty and my eyes won't get bigger.
 In this case, is it necessary to do skin excision? I'm worried that if I don't do the surgery, I'll have to have the surgery again later.