A sinus headache is a type of headache that may feel like an infection in the sinuses (sinusitis) . The pain is caused by pressure in the sinuses due to inflammation, which can be caused by an allergic reaction or an infection. Symptoms of a sinus headache include pressure, pain, and fullness in the cheeks, brow, or forehead, as well as a stuffy nose, fatigue, and an achy feeling in the upper teeth. However, it is important to note that sinus headaches are often mistaken for migraines or tension headaches, as the signs and symptoms of the two types of headaches may overlap. In fact, studies have shown that most people who see a healthcare provider for sinus headaches are found to have migraines instead. To distinguish between the two, doctors may ask about symptoms such as nausea or vomiting, sensitivity to noise or light, and the duration of the headache. If a sinus blockage, such as an infection, is the cause of the headache, antibiotics or corticosteroids may be prescribed.