What causes a girl's lower abdomen to appear large?

1. Fat accumulation: This is the most common cause of a protruding lower abdomen. If one does not pay attention to diet, frequently consumes high-calorie foods, and lacks physical activity, the excess calories that the body cannot burn are converted into fat and accumulate in the abdominal area, leading to a larger belly. 2. Gastrointestinal bloating: Abdominal gas may result from indigestion, slowed gastrointestinal motility, or intestinal flora imbalance. 3. Gynecological issues: Certain gynecological conditions, such as endometriosis or ovarian cysts, can cause abdominal distension. These conditions typically require diagnosis and treatment by a physician.