Alcohol has many effects on the brain, mainly manifested as serious damage to the brain, toxic effects on nerves, etc., as follows: 1, serious damage to the brain: alcohol will cause vasoconstriction of the brain, reduced blood flow, so that the cerebral cortex hypoxia, mental retardation, inattention, memory and judgment decline, easy to produce visual impairment; 2, toxic effects on nerves: affect the blood supply to the brain and Nerves, will make the brain atrophy, accelerate the aging of brain cells, the speed of death; 3, other: mainly the brain relationship breathing, perception and other functions, alcohol will slow down breathing, lower body temperature, serious cases will be life-threatening, to try to quit drinking early.