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.
Endorphin is a combination of the words endogenou (produced within the body) and morphine They're released from the pituitary gland of the brain during periods of strenuous exercise, emotional stress, pain, and orgasm. Endorphins help relieve pain and induce feelings of pleasure or euphoria.