There are three general harmful effects caused by stress. For example, colds, shrinkage of brain tissue and memory loss are the problems I referred to. First of all, stress causes cold. Stress can change the biochemical part of our body. and this can cause cold. Second, brain tissue shrinks. If you are too stressed, your brain becomes damaged and your brain tissue shrinks. "A 2012 study published in the journal Biological Psychiatry found that stress shrinks the brain and decreases a person's ability to cope with adversity. Participants showed smaller gray matter in their brains, 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) So, part of your brain has been. damaged by stress. If this continues, the problem may be more serious. The third thing is memory loss. Like what I mentioned. Stress mainly affects your brain. and it also affects your part of the brain that regulates memory. These three things are general harmful effects of stress. It is not only this that is the problem caused by stress. There are more critical issues, so we need to reduce the