This does not sound like fun!   You didn't tell me if you still use the Desonide 0.05% cream - even occasionally.  There is some fairly substantial data now that ANY topical steroid, used on the face over time, can make rosacea or perioral dermatitis worse.  This may be why you are still having problems.  I strongly recommend to my patients that they get off any topical steroids on the face (this often takes a long weaning process to avoid rebound flares). Can you consult a different dermatologist yet again?  There has to be someone in your community who might be able to help you.

Also, if Cetaphil makes you itch, have you tried the Free and Clear line (try their Vanicream cream or lotion).  You can buy this online.  Also, a culture should definately be done to rule out any bacterial colonization or infection issues.   I hope this helps!.  Dr. I