A member asked:

Perioral dermatitis - how fast does doxycyline work?

A doctor has provided 1 answer

Depends: If it is an infection then the Doxycycline might be of benefit, but it might not target the specific bacteria on the skin. If it is simply an irritant or allergic reaction, then Doxycycline will have no effect.

Answered 7/27/2018

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