Swollen feet in nephritis does not indicate that the condition of nephritis is aggravated. Certain conditions such as drinking too much water and prolonged lower limbs in low hanging parts can also lead to swollen feet. Nephritis, also known as glomerulonephritis, is a group of diseases caused by viral or bacterial infections, genetic abnormalities and other factors that lead to damage to the form and function of the glomeruli. It can cause symptoms in the body such as abnormal urine color, abnormal urine composition, edema, high blood pressure and fatigue. Due to the damage of glomerular structure or function, it will lead to the decrease of glomerular filtration rate and the dysfunction of tubular reabsorption, which will lead to the retention of water in the body and edema, which can be manifested as edema of eyelid, face, lower limbs, even pleural effusion, pericardial effusion, and even the whole body edema situation. In general, edema aggravation indicates that the disease recurs in patients with aggravated condition; however, swollen feet may also be related to drinking too much water, prolonged lower limbs in the low-hanging parts, and prolonged activities, so it is recommended that patients with nephritis should avoid excessive fluid intake, pay attention to rest, and avoid exertion. Nephritis patients are advised to consult regular hospitals in time and standardize the treatment under the guidance of physicians.