What causes pain?

Pain is an uncomfortable feeling that tells you something may be wrong in your body. Pain is your body’s way of sending a warning to your brain. Your spinal cord and nerves provide the pathway for messages to travel to and from your brain and the other parts of your body. Receptor nerve cells in and beneath your skin sense heat, cold, light touch, pressure, vibration and pain. You have thousands of these receptor cells. Most sense pain, and the fewest sense cold. When there is an injury to your body—for example, surgery—these tiny cells send messages along nerves into your spinal cord and then up to your brain.