The nicest demonstration indicates that high blood stress does not lead to headaches or nosebleeds, except in the case of hypertensive catastrophe, a medical emergency when blood tension is 180/110 mm Hg or higher. If your blood burden is unusually weighty viagra without a doctor prescription you be struck by pain in the neck or nosebleed and are premonition unwell, on the back burner serve five minutes and retest. If your reading remains at 180/110 mm Hg or higher, call 9-1-1.