The causes of stress are coined as stressors. This occurs in two forms: external and internal.
External stressors include major life events such as job loss, loss of a loved one or demands placed by the physical environment such as the excessive lighting or noise.
Internal stressors occur within us. We add internal stressors to our lives for example, if we have unrealistic expectations, negative self talks or choose a lifestyle where there is excessive caffeine and alcohol and constant lack of sleep.