The potential causes of stress are numerous and highly individual. What you consider stressful depends on many factors, including your personality, general outlook on life, problem-solving abilities, and social support system. Something that's stressful to you may not faze someone else or may even enjoy it. For example, your morning commute may make you anxious and tense because you worry that traffic will make you late. Others, however, may find the trip relaxing because they allow more than enough time and enjoy listening to music while they drive.
The pressures and demands that cause stress are known as stressors. We usually think of stressors as being negative, such as an exhausting work schedule or a rocky relationship. However, anything that forces us to adjust can be a stressor. This includes positive events such as getting married or receiving a promotion. Regardless of whether an event is good or bad, if the adjustment it requires strains our coping skills and adaptive resources, the end result is stress.