Psychological triggers like anxiety and stress are some of the most common causes of muscle tension. When a person starts to feel anxious or over-stressed, the muscles can react by tightening up. This can cause the tension that we are talking about here, and it can also lead to soreness, pain, and tension headaches.
If you have muscle tension that seems to be associated with stress, then you need to take steps to manage your stress. Stress management can be a broad approach to limit and reduce the amount of stress in your life, but it can also take the form of relaxation techniques that are designed to reduce stress in the moment.
One of the first things to do if you are trying to manage your stress is to actively take control of your life. Make a schedule for your daily tasks and your work; make sure to include time for yourself and exercise in that schedule.
If you are looking for things that you can do in the moment to relieve stress, you can try things like controlled breathing, meditation, stretching exercises, or you could go with something as simple as sitting down to take a break. During this break it is important to let your mind rest from thinking about things that worry you.