Most people can undergo a chemical peel for pimple scars. Your dermatologist will determine whether a peel is the right treatment for your scars or hyperpigmentation and whether you meet the criteria for eligibility. You may need to avoid or delay a chemical peel if you: Currently have or recently had a bacterial, fungal, or herpes infection Have had X-rays or radiation on your head or neck Have a suppressed immune system Had a major facial surgery within the past six months Have taken isotretinoin in the past 12 months Are pregnant.