I occasionally suffer from back pain. When I ignore my posture or when I lie down in a certain way or when I bend my body instead of squatting to pick up something, my back will cause me such excruciating pain. The doctor just prescribed me pain killers. He advised me on the proper way to sit and sleep and to pick up things without bending my body. When the pain hits me, it's so difficult to walk. But the pain will go away after I've rested.