It could be just the way your body is, but it could also be a sign of something else like sinus.
Let me tell you, this winter I thought I was so lucky because I barely got sick, I just had a lot of mucus (sorry tmi) then it all stop, only that I couldn't breath right, but I didn't do anything because I never really got sick.
Well, since yesterday I start having horrible sinus pain, I never knew I lower my head so much and so often until I got this point.
Now, I am on medications.
So I would suggest to just got it check in case it is a building sinus, because believe me you don't want to let it get as bad as mine.