Thank you for the enquiry. If it is the Day & Night Alpha Moisturiser + 5%, it may be the product causing a rash. I would rather recommend you stop using it and apply the Ointment (500g jar),for a few days. This can be applied as a “soap” rinsed off and re-applied to relieve the rash. I would rather introduce the Moisturiser with SPF30 as a more suitable day and night moisturiser for the sensitive skin. The Cream (dry skin moisturiser) may also be used thereafter as a good moisturiser.