Be careful of the "varicose vein treatment centers" that advertise on TV. If you may have something more serious than cosmetic issues related to varicose veins, be sure you are being treated by an actual vascular surgeon.

About 5 years ago, I had laser ablation of the greater saphenous vein in one leg, along with phlebectomy on numerous surface veins. That leg is now unfortunately getting bad again, and the other leg was already pretty bad 5 years ago but never treated. I have burning/pain in both feet, but worse on the leg that was never treated.

I did read a case study recently about a person who had a serious motor mononeuropathy that was causing intermittent weakness/foot drop due to a large varicose vein that was impinging on a nerve located behind the knee, so I guess it can happen.