Some hernias can cause a visible bulge along with skin discoloration and pain. These include umbilical, inguinal, femoral, incisional, epigastric, and spigelian hernias. Muscle hernias can cause swelling and pain. Hiatal hernias have no outward appearance but can cause symptoms such as stomach discomfort, heartburn, and pain when eating and swallowing.
Source: Medical News Today
