Internal Stressor

Internal Stressors are sources of stress that are coming from within your body or your mind. They include things like whether your are  tired, ill, hungry, hot, cold, nutritional status, your emotional state, what thoughts you're preoccupied with, your mood, and your attitudes. 

When you manage your Internal Stressors, it enhances your ability to deal with External Stressors, or things that come from your environment.