I'm a male in his late 20's, and for most of my life I've always been in relatively good health. I never had any real allergy problems to speak of throughout my youth, aside from having very sensitive skin reactions (especially to the heat and sun).
Anyways, over the last couple of years (this year in particular) I've been developing symptoms that would suggest that I may have allergies, specifically hayfever. Basically, every morning (since the Summer began) I've been sneezing like crazy upon waking up. I'll sneeze as many as 4-5 times in a row, and as many as 15 times within a half hour. Throughout the rest of the day, I'm usually ok, hardly sneezing at all. It's really only a problem that occurs first thing in the morning when I wake up. The nasal mucus is also completely clear, which would pretty much eliminate the idea that it may be an infection of some sort. The only other symptom I've been feeling is a bit of itchiness at the back of the roof of my mouth, but that's been very, very rare.
Based on these symtpoms, is it safe to say that it may be allergy related? Also, is it common for allergies to develope in people later in life?