Lower back pain and wanting to vomit may be caused by kidney stones, pregnancy, lumbar disc herniation and other factors. 1. Kidney stones: the cause of the disease is not clear, may be related to metabolism, urinary tract infection and other factors, due to the movement of stones, irritation of mucosal tissues, may be the symptoms of low back pain, the emergence of renal colic may be accompanied by nausea, vomiting symptoms. 2. Pregnancy: After pregnancy, the enlarged uterus presses on the lumbar vertebrae and lumbar tissues, resulting in symptoms of low back pain. Due to hormonal effects, nausea and vomiting may also occur in the early stage or throughout the pregnancy. 3. Lumbar disc herniation: this disease is related to the degeneration of lumbar discs and abnormal bearing and other factors, the patient will experience symptoms of lumbar pain, severe pain may cause nausea, vomiting and other gastrointestinal reactions. Lumbar pain and vomiting can be timely to the hospital, identify the cause of the disease after treatment.