Hydronephrosis is a dilatation of the renal pelvis and calyces caused by accumulation of urine in the kidney due to narrowing of the lumen of the urinary tract, urinary tract obstruction, or obstruction of the pelvic-ureteral junction at any part of the kidney up to the external orifice of the urethra, and is characterized by discomfort such as lower back and abdominal pain, nausea, and vomiting.
Hydrocele is the obstruction of urine drainage from the renal pelvis, which is mostly a congenital disease.
Patients with hydronephrosis may have pain in the lower back and abdomen, difficulty in urination, abdominal mass, etc. Some patients may also have hematuria, accompanied by nausea, vomiting and other discomforts, and in serious cases, it may lead to renal pus, or even renal failure.
To summarize, if you suspect the existence of hydronephrosis, you should go to the hospital in time for medical treatment.