A bilateral hernia is the presence of two inguinal hernias on both sides of the pubic bone. An inguinal hernia occurs when soft tissue bulges through the wall of the abdomen at the groin.
A bilateral hernia is caused much the same way as an inguinal hernia when there is a weakness in the abdomen muscles. This weakness can develop because of poor fetal development or stress in the abdomen. The stress in the abdomen can result from anything from strenuous work, cough, constipation, weight gain, to pregnancy. Men acquire inguinal hernias more than women do because of the way the testicles form, moving down the inguinal canal, and creating gaps in the abdomen muscle.