Most cases of acute nephritis do not cause complications; generally speaking, acute nephritis is a self-healing disease that can recover on its own. Approximately three to four weeks later, the condition can gradually alleviate, with the patient’s urine protein and occult blood decreasing until they disappear and kidney function returns to normal, and the edema can also subside, so generally there won’t be any complications. However, there are a minority of patients whose conditions are prolonged and do not heal, and if the patient's condition persists for three months or even half a year without recovery, it might evolve into chronic nephritis. Also, some patients may experience severe kidney failure, heart failure, and pulmonary infections during acute nephritis, leading to severe consequences. The likelihood of these situations occurring is relatively low.