If it's on the corners of your lips, it's probably cold sores. I've been having non-stop cold sores since September and my PCP says that it's because my body is being suppressed by the Remicade so the cold sores aren't able to heal. Pred might cause the same effect. If it's really bad, you could ask your doctor for either topical or oral meds.
Female, Age 20
9 Asacol, Rowasa, 1000 mg Canasa, Proctofoam, Rifaximin 2/day
Digestive Advantage (Crohn's & Colitis), 1 Florastor, 50 mg 6MP, 1 Primadophilus reuteri, Remicade (7 infusions), 2.4 g Lialda, Forvia, 6 Colazal, 1 Anucort, Culturelle, Fish Oil, Calcium/Vit D supplement, 20 mg Prozac, VSL #3 DS, Turmeric