Researchers found that 29% of those with OSA reported morning headaches. Sinus infections (infections to the passages behind the nose, below the eyes, and above the mouth) are another common cause ...

But even if you’re a headache veteran who's able to tough out even the most debilitating episodes, there are a few critical ...

Table 1. Causes of Headache and Third-Order Horner's Syndrome Dr. Jurkunas is affiliated with the department of cornea and external disease, Massachusetts Eye and Ear Infirmary, Boston ...