Stress can exacerbate every known mental and metabolic disorder. People with depression may get more depressed. People with alcoholism may fall off the wagon. People with schizophrenia may hallucinate. People with Alzheimer’s disease may get agitated and combative. People with epilepsy may experience a seizure. People with diabetes may have their blood sugar skyrocket. And people with cardiovascular disease may have chest pain or a heart attack. Some people die—from stress alone.