Hello and thank you for your question! Unfortunately, you cannot do Morpehus8 treatments while breastfeeding. Micro needling is a treatment that causes micro injuries through multiple needle punctures and relies on the skin to its healing process as a way of boosting collagen, elastin, and hyaluronic acid production - and since the vitamins and nutrients that are needed to heal the skin are being used while breast feeding - your healing process could be slower than usual, and you could end up with hyperpigmentation as a result. We also apply a numbing cream for comfort which contains lidocaine, which is not advised to use during pregnancy or breastfeeding.