It should be a symptom of neurasthenia. Have you been sleeping irregularly recently, often staying up late, and then you are under great mental pressure and tired? If so, it must be a nerve ache. It is recommended to follow normal daily activities and do more massage and physical therapy at ordinary times. If it is serious, see a doctor. You can find some reliable health products to take.
I used to be like this. I suffered for more than a month and thought I was dying.