These are acne scars which wil heal overtime, you just need the right medications and topical to make thew healing process even faster. But if you want a natural treatment then you might use natural aloevera gel and apply it all over your face will help you a lot, and remember to have patience as it's not gonna happen overnight. It requires time. Goodluck!

It looks like a mixture of scars and erythema, you would be better off consulting a dermatologist. Putting aloe vera on your skin as the above poster suggested will not cut it