Cafe au lait macules are difficult to remove and can behave unpredictably with treatment. Different wavelength Q-switch lasers have achieved moderate success with their removal. The latest picosecond lasers are touted to have more success.
Any certified doctor with the necessary laser license and laser will be able to help you treat cafe au lait macules, including dermatologists, aesthetic GPs or plastic surgeons.
Even with the same type of machines, there are different settings and different operator competencies. I would advise you to find a doctor that you trust and proceed carefully with the treatment.
