A linea alba hernia occurs when tissue protrudes through a defect in the midline tendinous seam of the abdominal wall, most commonly at or just above the umbilicus. Because the defect is small and lies between the rectus muscles, symptoms are often subtle but may include: Midline bulgeA soft, round or fusiform swelling appears along the midline when standing, coughing, or performing sit-ups; it reduces spontaneously when supine. Local discomfort or acheA dull, pulling pain is felt precisely at the defect, especially after prolonged standing, lifting, or core exercise; it is relieved by rest and manual pressure. Tenderness on palpationPressure... Learn more