Renal effusion usually requires treatment and renal crystals usually do not require treatment. There are many causes of renal effusion, such as urinary tract infection, urinary stones, urinary tumors and so on, which may lead to renal effusion. It is necessary to clarify the cause of the disease and carry out treatment in time to solve the situation of kidney effusion from the root. Kidney crystals are usually a precursor of kidney stones, mainly due to the formation of crystalline components from sediment or salt in the urine after the urine is concentrated. This is related to the patient’s living habits, and it is important to drink more water to increase the volume of urine, dilute the crystals, and help them to be discharged out of the body, and usually no special treatment is needed. If kidney fluid and kidney crystals are detected, it is recommended to consult a regular hospital in time to clarify the cause of the disease with the help of a doctor and carry out targeted treatment or therapy.