The term 'Cause of Angst' can be summarized as 'STRESS'. STRESS is a feeling of emotional or physical tension that can be caused by a variety of factors, such as work, relationships, or financial issues. It is a normal part of life, but when it becomes too much to handle, it can lead to anxiety and depression. STRESS can also have physical effects, such as headaches, fatigue, and difficulty sleeping. It is important to recognize the signs of STRESS and take steps to manage it in order to maintain good mental and physical health.