Headaches are very common during flu season and in fact, it’s one of the most debilitating side effects of a cold or flu. It’s especially difficult in the winter when you go from being warm inside your house or work, to the frigid cold weather outside. But why does this happen and what can you do about it?
There is a theory that headaches triggered by extreme weather are a protective or defensive response because they lead the person to seek a warm location. Another theory is that decreasing barometric pressure leads to an increased risk of headaches.
When you have the flu your body is being attacked by a virus, so as a way to protect your body, your immune system elevates your temperature and gives you a fever. Blood vessels become enlarged, increasing the pressure in your head, which give you headaches.