Dear Friend Welcome to Health care magic. I am Dr. Charu Bansal , I will shortly try to help you with my opinion. Penderm plus is a combination cream with steroid as one of the constituent. it is associated with many side effects like redness, pimples, striae, atrophy etc if used for undue prolonged period of time. i will advise you to stop using it at the earliest. instead use depigmenting creams containing salts like kojic acid, vitamin C, glycolic acid, arbutin etc. These are safer to use. Based on the available details, this is my best advice for you. You should discuss with your doctor and share my opinion, I am sure he/she will agree to my opinion. If you wish to discuss the problem further , you may please ask. Stay Healthy.