Cold sore: Viruses or localised infections can cause the eye to redden â the problem usually starts in one eye, but can spread to both. The cold sore virus, which 90 per cent of us carry, can sometimes also infect the eye, causing inflammation.
Endorphins are chemicals, called peptides, that are made in the body. They have much of the same effect on a person as opium or morphine. As a result, they actually lower the feeling of pain in the body and can create a feeling of bliss or euphoria.
Answers. Best Answer: Mechanism for transmitting pain is by the chemicals found in every nerve cell, called neurotransmitters. These either send or block pain messages. Serotonin is one such neurotransmitter.It blocks pain and induces a feeling of well-being. Endorphin is another neurotransmitter, a natural pain killer similar to morphine. The level of these chemicals varies between people and their production can be voluntarily increased, for example by vigorous exercise.erotonin is one such neurotransmitter. It blocks pain and induces a feeling of well-being. Endorphin is another neurotransmitter, a natural pain killer similar to morphine. The level of these chemicals varies between people and their production can be voluntarily increased, for example by vigorous exercise.