hi..Thanks for the query..
very infrequently result in post inflammatory hyper pigmentation on the spots which are more sensitive e.g. corner of nose,around eyes,around lips.So before application of the peel ,it is essential to apply a think later of petroleum jelly coating on the same.Next time when you do it,you can follow the necessary precautions.
As for the existing spots ,you can use topical Hydroquinone
2% once daily at night on the darker areas,taking care not to touch it in the surrounding normal skin.Its a must to use a Sunscreen with the GOOD SPF, preferably broad spectrum ( with both UVA/UVB ) coverage throughout the day ,as this prevents the constant stimuli of UV light to these spots to darken further.