There are no unexplained headaches, there are triggers for headaches that you just don’t notice. The common causes of headache triggers are as follows: 1. High work pressure or mental mood swings. 2. Some patients are in a state of insomnia and dreaminess. 3. If patients drink stimulating beverages, such as strong tea, coffee or eat cheese, they can cause headaches, especially if they drink alcohol. 4. 5. Headaches often occur in female patients before or during menstruation.