According to the American Headache Society, "people with allergic rhinitis (hay fever) are more than 10 times more likely to have migraine." An allergic reaction occurs when the body doesn't recognize a substance and over-reacts in an attempt to fight it off, according to the Mayo Clinic. The immune system releases different chemicals into the body to ward off the allergen which causes the common allergy symptoms such as a runny nose, nasal congestion, hives, watery eyes and an itchy throat. Allergies may lead to a person developing a headache such as a rebound headache, sinus headache or migraine.
Rebound Headache
A rebound headache is commonly associated with allergies. A rebound headache is pain in the head that comes and goes over a period of time. These headaches may improve as an individual comes in and out of being exposed to an allergen. Many times a rebound headache is connected to the sinus cavity's pressure increasing and decreasing. The best treatment for rebound headaches is avoidance. A person should stay away from any known allergens such as certain foods, pollen and pet dander.
Sinus Headache
According to the American Rhinologic Society, a sinus headache is the most common headache caused by allergies. An allergic reaction causes the sinuses to become inflamed. The nasal membranes swell, placing pressure on different areas throughout the head such as the eyes, teeth and ears. The over-sized sinus cavity also restricts normal sinus drainage, which can lead to trapped fluid and infection. A sinus headache is usually a dull, throbbing pain in the middle of the head that is alleviated by reducing the swelling in the sinuses. Decongestants and pain relievers are used to treat sinus pressure pain that causes sinus headaches, according to the American Rhinologic Society.
Migraine Headache
Migraines are headaches that last a long period of time that are known for intense pain, according to the Mayo Clinic. Migraines can be so severe that a person is affected by light and sound. Migraines can lead to a person becoming nauseated and sensitive to different atmospheres. Most migraine headaches will respond to over-the-counter pain relievers, according to the American College of Asthma, Allergy and Immunology (ACAAI). A person who is experience frequent migraine headaches should consult with a medical professional to ensure they are a result of allergies and not a more serious condition.
