Hello. thanks for posting your query.
You could stop applying the sudocream now. What you need to apply for 2 weeks is cortisone
cream twice a day. After 2 weeks you can apply glycolic acid
cream at night daily for a month. I have recommended this treatment as the cortisone cream will take care of any inflammation caused by reaction by dettol
. after the inflammation subsided glycolic acid will take care of the dark marks. If you let it alone it may take a few weeks for the dark marks to fade.