All perfect praise be to Allaah, The Lord of the Worlds. I testify that there is none worthy of worship except Allaah, and that Muhammad, sallallaahu ‘alayhi wa sallam, is His slave and messenger.
Laser is a photonic band and it has no effect on fasting because it does not nourish the body, and it is not of the same effect as food or drink. Ointments that are applied to the skin before or after using laser treatment have no effect on fasting also because they are not a nutrient (they do not nourish the body) as we have been informed by specialists in the field.
For more information, please refer to Fataawa 83522 and 162921.
Allaah Knows best.