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.
Endorphins are the bodyâs natural feel good chemicals, and when they are released through exercise, your mood is boosted naturally. As well endorphins, exercise also releases adrenaline, serotonin, and dopamine. These chemicals work together to make you feel good.he endorphins produced can be so powerful that they actually mask pain. Physically active people recover from mild depression more quickly and physical activity is strongly correlated with good mental health as people age.