I would be pleased to answer your question
The color of the skin will take 4 to 6 weeks to come back . please do not apply eumosone as that also contains steroids
. Steroids are the main causative factors for perioral dermatitis
I would suggest you to take an antibiotic like amoxicillin
for 10 days twice a day as that will help reducing the dermatitis .
You should also apply clindamycin
for the dermatitis to reduce further .
cleansing lotion : as a face wash .
The pigmentation will take its own time to reduce .
thanks and take care