What to do: See your doctor. While often not as dangerous as DVT, it needs evaluation.

5. May-Thurner Syndrome or Venous Compression Syndromes

What it is: A condition where an artery compresses a vein, usually in the pelvis, affecting blood flow from the leg.

Symptoms:

  • Left leg swelling (most common)

  • Visible veins in the leg or pelvic area

  • Pain or heaviness

  • Skin changes

  • Increased risk of DVT

When to worry:

  • If you have persistent, unexplained swelling in one leg

  • If you develop varicose veins at a young age

  • If you have recurrent DVTs

What to do: See a vascular specialist. Imaging tests can diagnose compression syndromes.

Other Conditions That Can Cause Visible Veins

Pregnancy

Increased blood volume and hormonal changes can make veins more visible. Usually temporary.

Hormonal Changes

Estrogen affects vein walls. Menopause, birth control pills, or hormone therapy can affect vein visibility.

Aging

Skin naturally thins and loses elasticity, making veins more visible. This is normal.

Low Body Fat

Less fat means veins are closer to the surface. Common in athletes and naturally lean people.

Genetics

Some people simply have more visible veins. If your parents did, you probably will too.