Normal: It is normal to apply retin a (tretinoin) each night and to wash it off each morning. Leaving it on too long, such as all day, could cause too much irritation.
Answered 12/14/2013
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A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
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