Difference between varicose veins and blood circulation

When I drive or do other activities and suddenly put strength into my leg, I get a cramp in my leg.

I used to think it was because of poor blood circulation.

However, after watching the TV commercial, I heard that the twitching is related to circulation problems.

I couldn't even think of going to the hospital because I thought the problem was blood circulation.

If the problem is with the saphenous vein, I wonder if getting medical treatment and care would help improve the condition.

It can be dangerous and a bit unsettling when I get a cramp while driving.