When women experience a swelling and bulging sensation in the lower abdomen, it is usually considered that they may be in their menstrual cycle, caused by uterine congestion, which is normal. If the lower abdomen is severely distended, it may be due to poor blood drainage. If women have symptoms of lower abdominal distension and bulging for a long time, they need to consider that it may be due to disease factors: 1, intestinal diseases: intestinal flatulence patients with intestinal discomfort or obstruction, causing gas can not be expelled from the body with intestinal peristalsis, often may appear flatulent feeling, accompanied by nausea, belching and other performance. Patients with intestinal obstruction will have symptoms of abdominal distension, abdominal pain, cessation of defecation and exhaustion, and even bulging intestines, and the performance may often show a feeling of distension and bulging in the lower abdomen; 2. Abdominopelvic diseases: pelvic inflammatory disease and ectopic pregnancy rupture may easily show symptoms of discomfort in the lower abdomen. Ovarian cysts may present with a feeling of heaviness or fullness in the abdomen and pain in the pelvic area. Painful discomfort in the lower abdomen and pelvis is one of the common manifestations of tubal inflammation, which may be accompanied by abnormal vaginal discharge and menstrual disorders. Adnexitis tends to cause prolonged swelling and pain in the lower abdomen, which can be mild or severe at times. There is also inflammation leading to tissue edema hyperplasia inflammatory exudation, pelvic effusion or tumor, may be the symptoms of lower abdominal distension and pain bulging; 3. Urinary system diseases: urethritis, cystitis may appear distension and pain in the small abdomen, accompanied by frequency, urgency, painful urination, lower abdominal pain and other uncomfortable symptoms, may also appear fever, chills and other systemic symptoms.