It started around the end of January 2010 for me, and I havent been taking anything different.
I started taking Fluticasone
Propionate, a nasal spray steroid
for my relentless stuffy nose, but the doctor didn't tell me anything about side effects. I had recently gotten a new puppy as well, but I've had dogs all my life and I've never had any allergic reactions to my prior dogs. I don't even think dogs can cause allergic reactions of swelling in the lip and lower back.