If you want to make your facial skin look better you can use Mint water. You just have to grind few mint leaves in water and apply on face. This method has generally no side effect and you can see the difference in just a few weeks.
Mint water can also be used as a toner or face mask and it makes your skin hydrated and oil free.
You can buy peppermint essential oil. Mix it with a carrier oil and apply on your skin after face wash in morning and at night.