Glomerulonephritis causes high blood pressure, affects the ability to cleanse blood, filter waste from the body, and causes the patient to experience generalized edema. Therefore, many people are puzzled about why glomerulonephritis causes high blood pressure and edema.

Edema is one of the common symptoms of various diseases, such as liver disease, kidney disease, vascular obstruction, or allergic reactions. Edema can occur in any part of the body, most commonly in the hands, feet, and ankles.