How pain works: In simple terms pain is a sensory and emotional experience that your brain controls and it does not need to be associated with actual injury or tissue damage. The primary function of pain is to be the bodies alarm system to let your brain know something is wrong. Receptors in your tissues respond to certain stimuli and send an electronic signal to your spinal cord. Here the electronic signal causes a chemical response in the nerve endings and these chemicals trigger an electric signal leading up to different parts of your