Headaches and difficulty sleeping may be symptoms of high blood pressure, but they may also be due to an underlying condition. Most of the time, high blood pressure has no symptoms. It is known as the silent killer. Symptoms that people may think are due to high blood pressure include:

1. headaches
2. difficulty sleeping
3. nosebleeds
4. sweating
5. flushing of the face
6. nervousness
7. blood spots in the eyes
8. dizziness

In most cases, high blood pressure does not cause headaches or nosebleeds. The best clinical evidence indicates that high blood pressure does not cause headaches or nosebleeds, except in the case of hypertensive crisis, a medical emergency in which the blood pressure is 180/120 mm Hg or higher. If your blood pressure is unusually high AND you have a headache or nosebleed and are not feeling well, wait five minutes and repeat the test. If your reading is still 180/120 mmHg or higher, make an emergency call. If you have severe headaches or nosebleeds and are not feeling well, contact your doctor - these could be symptoms of other illnesses.