The following conditions are common in small abdominal pain and blood in urine: 1, acute cystitis, common in female patients, in addition to lower abdominal pain, hematuria, mostly accompanied by urinary frequency, urinary urgency, urinary pain, perform urological ultrasound, urinary routine, urine culture examination can be diagnosed; 2, urinary stones, often manifested as lumbar abdominal pain, the nature of pain is colic, with radiating pain, will cause pain in the groin area, testicular pain, mostly accompanied by nausea, vomiting, perform urological Ultrasound or CT can diagnose; 3, urinary retention, common in elderly men, such as prostatic hyperplasia, mostly accompanied by frequent urination, incomplete urination, increased nocturia, difficulty in urination, physical examination can be found in the suprapubic bladder area filling, commonly known as small belly bulge, perform urological ultrasound can diagnose. So when there is small abdominal pain with hematuria, go to the hospital in time and do not think that taking anti-inflammatory drugs can treat it.