Bad kidney is usually referred to as abnormal renal function in clinical practice, and there is no significant difference between men and women. It can be manifested as edema, hypertension, oliguria and other symptoms. 1. Edema: When patients have abnormal renal function, the body metabolic waste and water discharge obstacles, water and sodium retention, causing edema. Nephrotic edema mostly occurs in loose tissue areas, such as eyelids; sagging parts of the body, such as ankles and anterior tibial area; and most likely to occur in the sacrococcygeal area when bedridden for a long period of time. 2. Elevated blood pressure: due to abnormal renal function, resulting in increased renal volume load caused by sodium retention, as well as renin volume balance imbalance, sympathetic nerve activity and increased plasma norepinephrine levels, which may cause the patient’s blood pressure to rise. 3. Oliguria: abnormal renal function leads to impaired water excretion, when there is severe edema, the water in the blood vessels into the subcutaneous, the volume of blood vessels is reduced, then the patient may appear oliguria phenomenon. Abnormal renal function may also have other manifestations, it is recommended that patients go to regular hospitals in a timely manner, improve the examination to clarify the cause of the disease, and then give targeted treatment or treatment under the guidance of the doctor.