I peel my skin using hydroquinone4% tretinone20mcg.now my skin is very fair.how can i maintain this skin?when the skin grows it is getting dark again

Maintainance Use: If you are using this cream to make your skin fair, that and if it startrs turning dark you have to use it again but may need to use three times a week for maintainance and may be able to stop it altogether at some stage i will suggest you consult a dermatologist but long term use can cause side effects like skin irritation etc.