Melanie
Cellulitis is caused by bacteria,mainly staph,it is an under the tissue infection usually made worse or caused by scratching.Although diabetics are more prone to it due to increased circulation,and some medications. Talk to your doctor about the meds your taking it could be that simple. My son gets cellulitis every time he gets a mosquito bite,we can't let him outside without being sprayed.Antibiotics are the treatment but unfortunately your body can build up a resistance so prevention is the best method. Push your doctors for answers