Hi there. Isotrexin in a topical form may be a better option. I for one, am against cortisone
for 99% of acne
lesions & they may in fact, precipitate acne. However, having said that, your treating dermatologist
on the ground will be in a better position to opine! A single lesion of acne is rarely 'cystic'. Please upload some photographs of the lesion & you may contact me in person or on this portal under the 'ask a doctor' feature for a 'second opinion'. Steroids
have far too many side effects for my liking especially in acne patients' fat atrophy
being just one of many especially if used liberally or for long periods of time...Dr Praveen Rodrigues MD Dermatologist, Cosmetologist, Venereologist, Vikram Hospital, Bangalore, India.