Normally, pregnancy does not present with kidney pain, but the enlargement of the uterus during pregnancy can easily lead to urinary tract obstruction and thus worsen urinary tract infections.
If the condition is not serious, the fluid may gradually improve after pregnancy as the uterus shrinks in size, during which time the pregnant woman should pay attention to her symptoms and visit the hospital for regular check-ups without excessive anxiety.
If the fluid is very severe, further treatment will be required as directed by your doctor.