□
□ □
[□]
People with severe or chronic tension headache may require stronger painkillers or preventive medications to reduce the frequency and severity of head pain . Indeed , some sequences of notes result from little more than a slowly changing phase relationship between oscillations governing air pressure and those controlling labial stiffness . More than 75 percent of respondents with spinach in their home threw it out . Regular aerobic exercise , such as walking , swimming or biking , can help reduce the frequency and intensity of headaches . Plotting an equation expressed in terms of angle and radial distance on exotic graph paper added to the allure . " The starts , stops , and pauses between syllables , as well as variation in pitch and timbre , are inherent in the mechanics and can often be expressed through smooth and simple variations in the frequency and relative phase of two driving parameters , " the researchers concluded . Allowing adequate space for your toes will help relieve pressure and pain . Beta blockers — which are commonly used to treat high blood pressure and coronary artery disease — can reduce the frequency and severity of migraines . Liaw and his coworkers worked with a Turing model that involves two interacting morphogens - - an activator and a substrate - - and takes into account the curvature of the lady beetle 's body by using a portion of a spherical surface to approximate the geometry of the wing covers . Your doctor can learn a lot about your headaches from your description of the type of pain , including its severity , location , frequency and duration , and other symptoms you may have .