The hernia is when fatty tissue or an organ squeezes through a weak spot or hole in the adjoining muscle or tissue.  When there is more pressure on an existing weak muscle or tissue, like obesity, heavy lifting, persistent coughing, constipation, etc., it pushes an organ or a tissue into the weak spot resulting in a hernia. The occurrence is more along the abdominal wall, and sometimes it is even visible as a bulge from the outside.