The back of the head is covered with thick muscles and the skull bone is thicker at the occipital tuberosity, so a fall to the back of the head does not usually result in hemorrhage of the brain tissue in the posterior cranial fossa. However, external forces can be transmitted through the back of the skull to the forehead, causing a contralateral injury. Because the skull base of the forehead is uneven and has more prominent bony spines, the underside of the frontal lobe is susceptible to contusion hemorrhage at the anterior skull base, so a fall to any part of the back of the head may result in hemorrhage in the frontal lobe of the forehead. If the amount of frontal lobe bleeding is not large, it is usually not dangerous and can be treated conservatively with medication. If both frontal lobes have bleeding, and the amount of bleeding is large, it may cause brain herniation causing life-threatening injuries, requiring emergency craniotomy to remove the hematoma.