At the end of May, I returned from a 5 day trip to NYC, flying from Tampa to NY. I have lympedema in both legs and two days after my return, I came down with cellulitis in my legs. I took Keflex for 12 days. Then at the end of June, I traveled to Evanston, IL for a 2 day conference and then to Toledo to visit my parents for 4 days. Three days after my return home, I came down with another bout of cellulitis. My skin appears to be in good condition. Could flying be involved in causing this condidtion? Thank you.