If you are beginning the OUMERE regimen with damaged, weakened skin, acne or any skin barrier issues, it is likely that No. 9 will cause an initial skin purge. This is referred to as an ‘acne flare up’ and is common when first using an exfoliant. The exfoliant is working on damaged skin, and will often require skin to appear worse before it gets better because the exfoliant is revealing damaged skin underneath. With time, the flare up will subside and leave your skin clear. The more damaged your skin, the longer the flare up will last. More information on skin purging can be found here.