Imbalances in the Blood Sugar When someone stressed does not eat the right amount of food or the correct amount. of nutrients, they will start to encounter inconsistencies in their blood sugars. These inconsistencies lead to the person not behaving as they normally would. Examples include Tiredness Lapses of concentration Mood swings If stress is not dealt with properly in the short term, the body will suffer in the long. haul with blood sugar problems that are much more serious, such as diabetes