Individuals with nasal allergies do tend to have more sinus problems, including sinus infections. Although not everyone with sinus problems has allergies, because many do, it is often helpful to do allergy testing in people with chronic or recurring sinus problems (such as sinus infections).
Allergy test results can help in terms of environmental control — measures to help minimize allergen exposure. It can also help guide the timing of medication, knowing when best to start and stop medications to not only treat sinus problems, but also help prevent them. In many instances, allergy testing can also open up the possibility of allergen immunotherapy (allergy shots) which can significantly improve not only nasal allergy problems and asthma, but conditions to which these contribute as well.
So, even though allergic disease can be a significant underlying factor in sinus disease, there are good treatments that can help resolve and prevent sinus problems!