Possible side effects Azelaic Acid?
For those just starting out using Azelaic Acid, irritation can sometimes occur as the skin adjusts to the ingredient. Usually, this irritation is mild and gets better as regular use of the treatment continues. Azelaic Acid can also sometimes cause skin discolouration and lightening – particularly in darker skin types.
For further advice please see our "I am experiencing dryness and irritation, what should I do?" FAQ here.