Suggest Treatment For Recurring Cellulitis On Feet

my daughter is 13 years old and has cystic fibrosis. In the past 6 months she has had "cellulitis" in three different spots on alternating feet. She has been suffering with intermittent joint pain for the past few months (wrist, knees, ankels etc) She has an appt with a rheumatolgist in May. Could this really be recurring

cellulitis? or are they missing something.?