Patients with hydronephrosis should pay attention to a light diet, eat more fresh vegetables and fruits, avoid spicy and stimulating foods, and consume less high-salt foods, while also abstaining from alcohol. Besides controlling their diet, patients with hydronephrosis should also actively search for the underlying causes of the condition. Common causes of hydronephrosis in clinical practice include urinary tract stones or prostate hyperplasia, mainly due to obstructions in the ureter or urethra, preventing the urine produced by the kidneys from being excreted, which then leads to hydronephrosis. Once the cause of the urinary obstruction is identified, it is necessary to actively treat the underlying cause to restore the patency of the urinary tract. After the condition improves, it is also important to drink more water and urinate frequently to maintain health.