opportunistic infection - any infection caused by a microorganism that does not normally cause disease in humans; occurs in persons with abnormally functioning immune systems (as AIDS patients or transplant patients receiving immunosuppressive drugs)
Why your 'flushing' could be a red alert to see your doctor. It is a normal body response that may occur when we are embarrassed, angry, excited, or experiencing other strong emotions. But 'flushing' - when the face, ears, neck and, occasionally, upper chest, take on a red colour, accompanied by a hot feeling - can also be a sign of a more serious underlying condition.
The ethanol content in alcohol that is meant for consumption causes the release of Dopamine in the brain. Dopamine is a neurohormone whose increased release causes the heart rate and blood pressure to increase. This gives the initial flushed feeling and imparts a sudden warmth to the face and extremities of the body.