What caused swelling on the left foot

Causes and signs of edema

A variety of diseases can cause edema. Then the edema itself is usually not a serious disease, but it can be a sign of it. Examples are:

A (Venous valve weakness, venous insufficiency) can cause edema in the feet, lower legs and ankles, as the veins can no longer properly transport the blood back to the heart. This causes it to build up in the legs and fluid is pressed out of the vessels into the surrounding tissue. Varicose veins can also cause edema.

A Heart failure () can cause swelling of the arm or leg as well as a build-up of fluid in the abdomen (ascites or ascites). The weakened heart is no longer able to pump the blood vigorously through the body, so that the blood backs up in front of the heart. This and the increased pressure in the veins shifts fluid from the blood vessels into the tissue. As a result, the legs swell or water collects in the abdomen.

If the affected person lies down a lot, the edema can also appear on the back (anasarca). If the heart is weak, fluid can also build up in the lungs (pulmonary edema) - a not very common, but life-threatening condition. The lungs fill with fluid because the heart is too weak to handle the return of blood from the lungs. The blood backs up and fluid leaks into the lung tissue. Signs of pulmonary edema include shortness of breath, rapid and shallow breathing, or coughing.

Kidney disease can lead to edema in the legs and around the eyes (eyelid edema): If the kidneys do not remove enough water and sodium from the body, the pressure in the blood vessels increases, which can lead to edema.

Deficiency of protein in the blood: If the protein albumin is missing in the blood, fluid from the vessels can more easily get into the tissue. A low protein level can result from extreme malnutrition. Another possible cause is kidney and liver disease, in which the body loses too much protein or produces too little of it.

Liver disease: Even if the liver tissue is scarred (), for example after many years of alcohol abuse or after a liver inflammation, edema in the abdomen can occur (ascites). Cirrhosis causes a lack of protein and a congestion of blood in the liver, which increases the pressure in the blood vessels. This pushes fluid out of the blood vessels into the abdominal cavity.

Severe lung disease such as one can cause edema in the legs and feet as the pressure in the lungs becomes very high. The blood accumulates in the heart and veins.