question: 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.