Thank you for your question. Retin-A is effective in treating comedones (whiteheads and blackheads) but ice pick scars are deep and topical treatment is not very effective. Atrophic scarring, including ice pick scars, are best treated with modalities that cause injury to the skin causing subsequent collagen formation. Treatment options include fractionated laser, dermaroller or dermapen, resurfacing lasers, deep peels, etc., may help your condition. The right modality for you depends on your skin type, expectations, patience, downtime, and cost. I highly recommend you consult with a board certified dermatologist or plastic surgeon to discuss treatment options that best suit your needs. Take care and good luck.