Chronic pain is a common issue in most people. Some people remain confused understanding the difference between acute and chronic pain. If you are also unable to understand then you must check this.  Acute pain is the general physiological response to any injury which is the shock that you feel when you cut or burn your hand. Acute pain can be very intense but stay for a short period of time. This goes away after some time.  Chronic pain is the signal that your brain continues to receive long after you recover from any injury or illness. One of the prime reasons for it is the damage caused to the peripheral nerves. Therefore even when the injury starts healing the nerve continues getting that signal and sends it to the body.