Veins have one-way valves to channel blood back to your heart. Varicose veins develop when a vein’s valve becomes weakened or damaged, allowing blood to pool in the vein. This enlarges the vein and it often becomes visible just below the skin.
Weakened or damaged vein valves can be caused by:
- High blood pressure inside the superficial leg veins
- Standing for long periods of time
- Weakness in the walls of the veins
The most common symptoms of varicose veins include:
- Heavy, tired, restless or achy feelings in your legs
- Leg cramps that occur at night
- Small visible clusters of veins in a winding pattern on your legs, or soft, tender knots of veins
- Skin changes on your legs, such as color change, irritation or sores
These symptoms can become worse after standing or sitting for long periods of time. Other symptoms may include:
- Veins visible through the skin, appearing enlarged, twisted and swollen (and sometimes blue)
- Leg cramps
- Burning or throbbing in the legs
- Itching
- Swollen legs
- Swollen ankles and feet
- Soreness behind the knee
- Sores, known as venous ulcers, that develop in severe cases
Risk Factors
- Family members with varicose veins
- Gender: Nearly 50 percent of women ages 40 and 50, and about 75 percent of women ages 60 to 70 have varicose veins
- Hormonal changes, such as with pregnancy or menopause
- Pressure on the veins of the pelvis, as with pregnancy or constipation
- Obesity
- Working at a job that requires standing on your feet for long periods of time
- Wearing knee-high socks or stockings with tight elastic
- Previous leg injury
- Use of birth control pills
- Post-menopausal hormone replacement therapy
- History of blood clots
While varicose veins can be easily seen in most cases, your doctor may also order an ultrasound of your leg veins to confirm the diagnosis.