A headache at a fixed time every day may have a neurovascular headache. It is caused by poor sleep, or due to mental stress, as well as overstress and overexertion. Patients need to have their blood pressure measured to see if it is due to high blood pressure. The human body has a biological clock, and everyone’s blood pressure rises at different times, some in the early morning and some in the afternoon, so patients with fixed-time headaches should have their blood pressure measured. There is also a possibility that the headache is caused by psychological factors. Patients can go to the hospital to have the anxiety and depression scale checked to see if there is depression causing the headache and to identify the cause.