Varicose vein treatment? Surgery? I'm curious about the duration~

I have a question regarding varicose veins.

My mother seems to have symptoms of varicose veins, and I would like to seek treatment. I have a few questions.

1. Is there a procedure for varicose veins?

2. If there is no procedure and only surgery, what is the usual process?

3. How long does the surgical procedure take?

How long is the recovery period after surgery?

I have many questions, but I would appreciate it if you could answer only the parts you know.

Thank you~