Nervous strain, also known as TENSION, is a state of mental or emotional strain caused by stress. It is characterized by feelings of anxiety, irritability, and restlessness. It can lead to physical symptoms such as headaches, muscle TENSION, and fatigue. Nervous strain can be caused by a variety of factors, including work-related stress, family issues, financial problems, and health concerns. It is important to recognize the signs of nervous strain and take steps to reduce it in order to maintain good mental and physical health.