Extremely cold, may cause skin sensitization. Cool application relaxes the skin after dermaroller, but I advise you to avoid direct contact with the skin.
Using salicylic acid after dermal roller can irritate the skin resulting in redness, flaking and possibly darkening of the skin. I would advise you to allow 2 weeks for the skin to heal, use a sun block factor 30+ and avoid using salicylic acid and micro needling together.
It is very important that anything you put on the skin after microneedling has been specifically tested and proven to be safe to use after this procedure. Micro-needling creates thousands of micro-channels in the skin which enhance penetration of topical serums and medications, drama...
