Thanks for your question. I would not let any marks that appear just a few days after Fractora concern you. It is an intense and effective treatment. That being said, keep the area clean and hydrated, and stay out of direct sunlight at all costs. Keep an eye on the healing process and note any changes to the skin. Bring these concerns up with your provider at your follow-up appointment. Here are my tips for successful acne scar revision:RF needling- Needles combined with Radio Frequency create microchannels in the skin, creating collagen. There are many great systems available, but seek on that is safe for all skin types. I like Fractora. Pinpoint irradiation- Specialized technique I use where strong beam profile of a Co2 laser is directed to each individual scar. Think of it as painting each scar with laser to get the maximum benefit. Erbium- An ablative laser to improve skin texture and improve collagen production. Microneedling- Microneedling used alone is a good, but it especially effective as an add-on to the above treatments. Combining different modalities increases efficacy. Cross-TCA- 100% acid directed at the scar will build collagen. Subcision- Cutting the scar free from the tissue and filling in depressions with either a High G prime filler or Bellafil. This requires a skilled and experienced physician to perform. PiQo4- Made for reducing hyperpigmentation or Post Inflammatory Hyperpigmentation, this laser is safe for all skin tones. Several sessions are needed for optimal results. Best, Anil Shah MD