After your Dermapen treatment, its normal to see redness and for the skin to feel tight, almost like a sunburn. The degree of the redness will be different from person to person and form treatment to treatment, and may last 12 - 24 hours. Your skin may be sensitive to touch and slightly pink and swollen for few days after the treatment. this should improve by the 3rd day. Some people may also experience mild flacking of the skin by day 4 after treatment. Most people continue with there normal activities after the treatment, however it is recommended to avoid work outs, swimming, makeup and sun for at least 24 hours after the treatment.