Overeating can be a problem for a lot of people like you. There are many negative effects of overeating. You can grow abnormally fat then you are supposed to. You can create problems in the normal functioning of your body. Sometimes eating unhealthy food also is the reason for you to grow older than your actual age. However, there are many reasons for you to overeat. For some, it may be a habit. There have been instances where people overeat because it is in their hereditary. For some, the main reason for eating is depression. Yes, depression can be a very good reason for you to overeat.