What Causes Watery Discharge Through The Lesions?

I have been diagnosed with deep-follicle folliculitis. I get these very large lesions, sometimes they are as big as two inches across, that form a blister. My problem is that the lesions are not puss filled. When ruptured it s like pure water comes out. My infectious disease doc had the liquid cultured but it came back inconclusive. My doctor put me on doxycycline hyclate, bactroban up my nose and washing twice a day with hibiclens and that did not help at all and I got black hairy tongue. The first time I got it was at the end of a 4-week trip to asia in 2011. I had it most of the summer of 13. What is really odd, is that when I go to Panama (I own a home there), it goes away immediately. Return to the United States and it comes back. I ve had it this summer for about a month. I don t want to keep trying antibiotics. My husband and I get it at the same time but he has fewer, much smaller lesions. Any ideas?