Mental and physical stress is a trigger for unstable angina , which is chest pain due to not enough oxygen reaching the heart. There is a higher risk for serious heart events, such as heart attacks . Death can occur from such events. Sudden stress can cause the heart arteries to constrict, causing blockage of blood flow to the heart. Chronic stress causes the immune system to become less effective.
Prolonged stress can disrupt the digestive system, irritating the large intestines.
This can lead to diarrhea , constipation , abdominal bloating, and cramping. Stress may predispose a person to peptic ulcers . The effects of stress on weight can vary. Some people lose their appetite and lose weight. Chronic stress has been associated with the development of diabetes and the impairment of a person's ability to manage the disorder.