Definition of scholar. 1 : a person who attends a school or studies under a teacher : pupil. 2a : a person who has done advanced study in a special fieldb : a learned person.
Allergy migraines can be triggered by an allergic reaction to food. With a food allergy, the immune system mistakes a food as harmful and releases substances that can trigger head pain and congestion. Migraines can also be caused by seasonal allergies or hay fever. Seasonal allergies can cause the sinuses to swell, which can trigger migraines. Allergy migraines can also be caused by common indoor allergens like urine, dried skin, pet dander, cockroach particles, mold and dust mite droppings.
It's a different story with allergies. They're caused by an overactive immune system. For some reason, your body mistakes harmless things, such as dust or pollen, for germs and attacks them. When that happens, your body releases chemicals such as histamine, just as it does when fighting a cold. This can cause a swelling in the passageways of your nose, and you'll start sneezing and coughing. Unlike colds, allergies aren't contagious, though some people may inherit a tendency to get them.