Painless swelling of the feet and ankles is a common problem, particularly in older people. It may affect both legs and may include the calves or even the thighs. Because of the effect of gravity, swelling is particularly noticeable in these locations.

Foot, ankle and leg swelling is common with the following situations:

• Prolonged standing
• Long airplane flights or automobile rides
• Menstrual periods (for some women)
• Pregnancy -- excessive swelling may be a sign of pre-eclampsia (a serious condition that includes high blood pressure and swelling; sometimes called toxemia)
• Being overweight
• Increased age
• Injury or trauma to your ankle or foot

Leg swelling may be a sign of heart failure, kidney failure, or liver failure. In these conditions, there is too much fluid in your body.

Other conditions that can cause swelling to one or both legs include:

• Blood clot
• Leg infection
• Venous insufficiency (when the veins in your legs are unable to adequately pump blood back to the heart)
• Varicose veins
• Burns including sunburn
• Insect bite or sting
• Starvation or malnutrition
• Surgery to your leg or foot

Certain medications may also cause leg swelling:

• Hormones like estrogen (in birth control pills or hormone replacement therapy) and testosterone
• A group of blood pressure lowering drugs called calcium channel blockers (such as nifedipine, amlodipine, diltiazem, felodipine, and verapamil)
• Steroids
• Antidepressants, including MAO inhibitors (such as phenelzine and tranylcypromine) and tricyclics (such as nortriptyline, desipramine, and amitriptyline)