Can a 21 year fit person get varicose or spider veins?

Spider Veins: Yes, if you sit for long periods of time this can promote the formation of varicose veins. Consider frequent movement and using compression stockings.

YES: Varicose vein & spider veins are a typically a gentically acquired problem (weakened valves within the leg veins) & can appear very early in life. I have treated many patients in the teens and twenties. They get worse the longer you live with them (due to the gravity affect on the faulty valves). Use compression stockings & seek opinion from a board-certified vascular surgeon who treats veins.

Leaking valves: Varicose veins are a very common problem and they are due to leaking valves (called reflux) usually in the saphenous veins. Think of your veins like a tree with the trunk being the saphenous vein and the branches being the varicose veins. A venous reflux ultrasound will make the diagnosis. Common causes of this are hereditary, aging and pregnancies in women. They can occur in any one.