sentences:  Disadvantages of light therapy can include its cost, the need for multiple visits, the time required to complete the procedure(s), and pain associated with some of the treatment modalities.Typical side effects include skin peeling, temporary reddening of the skin, swelling, and post-inflammatory hyperpigmentation.Dermabrasion is an effective therapeutic procedure for reducing the appearance of superficial atrophic scars of the boxcar and rolling varieties.