Varicose vein surgery related

My parents have varicose veins.

It's been quite a long time, but I've just been neglecting it ㅠㅠ

Actually, they say surgery is the only answer, but even with surgery,

In the end, I heard that varicose veins develop elsewhere, among other things ㅠㅠ

So I haven't done it yet, but I wonder if I really need to have the surgery or if there are any ways to improve the situation.

I'm curious about the reviews if someone has had surgery ㅠㅠ