Back pain, nausea and vomiting are mostly caused by kidney stones or stomach diseases, as follows: 1. Back pain may be kidney colic, kidney stones have entered the ureter causing irritation and damage to the ureter, there are three narrow locations in the ureter on the way down, when passing through there will be a painful sensation, nausea and vomiting are neurological reflexes, severe pain causes nerve reflexes and nausea and vomiting reactions. And the pain is easy to make the peritoneum affected and cause irritation to the intestines and stomach. Patients must go to the hospital for ureteral ultrasound and routine urine examination in time.2. Digestive diseases of the spleen and stomach often cause feelings of nausea and vomiting and can be accompanied by involvement pain in the lower back. This condition is accompanied by digestive discomfort, such as flatulence, pain, acid reflux, belching and loss of appetite in the abdomen.3. For women, pregnancy should also be excluded. The possibility.