High blood pressure is called the "silent killer," because there are few physical symptoms of high blood pressure. However, hypertension can be a major cause of heart attacks and strokes.
High blood pressure can cause headache, but in general is not the cause of recurring headaches. Blood pressure usually has to be quite elevated to cause headache. Studies show that headaches have been precipitated by blood pressures of 200/110 or higher. A physician should determine whether or not an elevated blood pressure is responsible for a patient's headache. Blood pressure can also increase when you are in pain.
Some high blood pressure medications can also cause headache. On the other hand, some blood pressure medications, including beta-blockers (propranolol or Inderal) and calcium channel blockers, are taken to reduce headache frequency. Sufferers with poorly controlled high blood pressure should not use triptan medications.
See your healthcare provider for evaluation and treatment of hypertension.