When we think of veins, it's usually related to our arms and legs. Back in school, we learned that they are part of our circulatory system and are responsible for collecting blood low in oxygen from organs and returning it to the heart.

The veins in our legs have valves that help blood flow to the heart. When those vein walls are weakened or when those valves are damaged, blood can back up and cause the veins to swell. This is a serious condition that can cause illnesses throughout the body, including vein disease.

The femoral vein, located in the upper thigh, is responsible for collecting blood from tissues in the lower leg and pushing it toward the heart. Diseases like obesity or Type 2 diabetes can damage leg veins and lead to the following conditions: 

• Deep vein thrombosis. A type of blood clot that forms in a major vein of the leg or other parts of the body.
• Peripheral vascular disease. A disease that occurs when there's not enough blood flow to keep up with the demand of walking, causing leg pain.  
• Venous insufficiency. A long-term condition that takes place when valves in the veins don't function properly. It may also occur due to previous blood clots in the legs.

All of these conditions deprive the heart of oxygen-rich blood, making it difficult for the body to function properly.

Another condition that is directly related to heart problems is one that is very common: varicose veins. According to the National Heart, Lung, and Blood Institute, varicose veins usually occur in the leg when weak or damaged valves cause blood to build up within the vein, causing poor circulation to the heart. What also results is swelling that is visible just under the skin. Symptoms include:

• Bluish veins
• Feet or legs feeling heavy
• Itching in the areas around your veins
• Leg cramps during sleeping hours
• Pain in the legs

Left untreated, varicose veins can lead to different complications including bleeding, sores, or blood clots. You should see your provider immediately if you have symptoms. However, you should know that you may be at higher risk for the condition if you:

• Are a woman
• Are pregnant
• Don't exercise
• Have a family history of varicose veins
• Have obesity 
• Sit or stand for long periods

There are several things you can do to care for your legs and, in turn, care for your heart. Your provider may recommend the following tips to help manage your symptoms and prevent cardiovascular disease:

• Avoiding standing or sitting for long periods
• Keeping legs elevated
• Medicines
• Regular exercise
• Wearing compression socks
• Working toward a healthy weight