The appearance of small stomach and waist have uncomfortable situation, may be the following aspects of the disease and lead to: 1, may be caused by urinary stones, this situation can appear unilateral lumbar and abdominal pain, like colic, and sudden onset, the pain is very strong, but also lead to the emergence of cold sweats, pallor, and other symptoms. 2, may be the cause of urinary tract infections, the most common is pyelonephritis, Cystitis, will be combined with frequent urination, urinary urgency, urinary pain, and even blood in the urine.3, may be caused by some gynecological inflammation, the most common is acute or chronic pelvic inflammatory disease, in addition to bilateral pain in the lower abdomen or stomach, but also induced by bilateral lumbar discomfort or pain in the symptoms.