Ventral hernias occurs when abdominal tissue bulges through a weak spot in the front abdominal wall, appearing as a bulge in the abdomen. Causes include obesity, coughing, straining, pregnancy, and previous abdominal surgery. Symptoms range from a visible bulge to pain, tenderness, nausea, vomiting, and constipation. Treatment often involves surgical repair, though small, asymptomatic hernias may be monitored.