My forehead is started to peel/dry skin what can I do to get rid of this and how long will it take to disappear?

Moisturizer. If dry skin is the issue their are several facial moisturizers available at your local pharmacy. Shop the beauty aisle. Can also have your pharmacist pick out their favorite choice. Advice free- just ask them.
Use the product for about one month. Should see softer skin. Can also take oral Fish Oil or Flaxseed Oil to add moisture from the inside of your body. Dermatologists are - skin specialists.