These procedures should not be done together; They are both great individually- I recommend microneedling for perioral lines, textural changes of the skin, superficial acne scarring and melasma. The down time is only 3 days. It also boosts collagen production, and it is great for all skin types (even darker skin).TCA is better for sun damage, precancers, lentigines (sun spots), mottled pigmentation on the neck and face (sun damage also), and occasionally acne as well. I use it with caution on darker skin types (have to do a test spot or lighter peels first). Consult with your board certified dermatologist to find out which procedure is right for you. You may need more than 1 treatment session to get your desired result. Best, Anita Gill MD