There are three general negative effects caused by stress. For example, colds, shrunken brain tissue, and memory loss are the problems I referred to. First of all, stress causes colds. Stress can change the biochemical part of our body. and can cause colds. Second, brain tissues shrink. If you are too stressed, your brain becomes damaged and your brain tissues shrink. "A 2012 study published in the journal Biological Psychiatry found that stress shrinks the brain and reduces a person's ability to deal with adversity. Participants showed smaller gray matter in the brain, in the prefrontal cortex, a region responsible for self-control, emotions and physiological functions such as regulating glucose and insulin levels."( Borreli, October 30, 2014) In this way, a part of your brain has suffered damage due to stress. If it continues, the problem may be more serious. The third thing is memory loss. Like the one I mentioned. Stress mainly affects the brain. and this also affects the part of the brain that regulates memory. These three things are general negative effects of stress. Not only these things are the problem caused by stress. There are more critical problems, so we need to reduce the