Do I have a nose picking problem?

I find myself at least once an hour picking my nose. I always get something out and I feel I do it cause if I don't I have trouble breathing. I do it as privately as I can but It's embarring. Can it be a medical problem? I don't feel I do it as a habit or boredom. I do notice that I'm always taking a quick exhale through the nostril to "test' the airway and find myself unsatisfied with the result. So I pick...again