Hi..I Have Used Methoxalen1/1500 On A Little Part Of My

Hi..I have used methoxalen1/1500 on a little part of my skin face which had a white spot,2times a day and exposing to the sunlight for 5 min each day.after40 days I got better but after that in the same area I have itchy red inflammation and acnes.I used Alfacort cream at nights for10 days but nothing happpened.what should I do now??