 [ Symptoms ] what can i do about the redness i get after using retin a and vitamin c [ Disease ] first try using a different formulation of each generally creams are less drying to the skin than gels if this does not help you may need to chose a lower strength formula or apply the creams less frequently second be sure that there is not an ingredient in your current formulations    such as propylene glycol    that might make your skin more sensitive or irritated examine the ingredients lists in whatever you are using and consult with your health care provider about undergoing skin tests to find this out