Our elixir serum accelerate the cell turn over, and some people might undergo a purging phase as soon as they start with the skincare acid routine. However, this shall subside in 2-3 weeks. If the purge lasts longer than 6 weeks, quit using the product, and consult a dermatologist. He/she may revise the frequency of application of the product or adjust the dosage. Or, suggest an alternative.