hi, I went to work fine, after about 1 hr. of working in the hot sun, my upper right lip started to swell. I felt very dehydrated and dizzy. I started drinking lots of water, and retreated to a very cool environment for a couple of hours. by this time, my whole entire lip was very swollen with no pain, and it s still swollen after several hrs. Please tell me what s going on. PS. I also take 5 mg of lysinopryl at morning and night ( it also includes a diahretic).