Ureteral stone 0.4cm, if not accompanied by obvious symptoms is generally not serious; if accompanied by obvious symptoms such as nausea, vomiting, increased blood pressure, urinary frequency, urinary urgency, urinary pain, etc., then the symptoms are more serious, you should consult a doctor for examination in a timely manner, and actively cooperate with the doctor’s treatment. Ureteral stone 0.4cm, if the patient has no obvious clinical manifestations or only a slight pain, swelling, this time without treatment, usually should drink more water and urinate more, close observation and follow-up. If the ureteral stone 0.4cm, and accompanied by nausea, vomiting, increased blood pressure, urinary frequency, urinary urgency, urinary pain and other symptoms, should be actively treated. Treatment methods mainly include drug stone dissolution, drug lithotripsy and so on. Ureteral stone patients should pay attention to a light diet, eat less spicy food, eat more fresh fruits and vegetables; keep clean to prevent urinary tract infection, and drink more water to increase urination. If discomfort occurs, it is recommended that patients go to the hospital in time, under the guidance of the doctor’s treatment.