Pain management hypnotherapy can access this natural morphine in your body and train your mind to access and activate the appropriate neurotransmitter to reduce the pain that you feel.
The pituitary gland and the hypothalamus produce endorphins naturally during activities such as exercise (the so-called runner's high is an example), being in love which can produce a bit of an adrenalin rush, as well as experiencing and orgasm.
Like real morphine, endorphins produce good feelings, blocking out the bad feelings. In this case, pain. Your nerve endings send messages to your spinothalamic tract. These nerve endings receive their messages from sensations that affect your body. The sensations activate the nerve endings which then transmit the messages to the spinothalamic tract, a pathway through your spinal cord.