5 Health Conditions That Can Cause Visible Veins

Visible veins—especially on your hands, arms, or legs—are often considered as a harmless sign of aging, low body fat, or physical activity. But in some cases, suddenly visible veins can signal underlying health problems that shouldn’t be neglected. Below are five conditions that could be behind those bulging, noticeable veins.

1. Chronic Venous Insufficiency (CVI)

Chronic venous insufficiency happens when the valves inside your veins weaken or fail, preventing bl00d from flowing efficiently back to the heart. As a result, bl00d pools in the limbs—especially in the legs—and veins can appear enlarged, twisted, or bulging.

Symptoms include:

Visible, rope-like veins
Swelling, heaviness, or aching in the legs
Discoloration or ulcers near the ankles

CVI is more popular in older adults and people who stand or sit for long periods. Left untreated, it can cause serious complications like leg ulcers or blood clots.