Is melasma treatment effective for pigmentation?

Even when I dab it with concealer, it shows through as a dull layer over time, so I am planning to get professional treatment for melasma this time.

I was scared after reading that if the wavelength or intensity of pigment lasers isn't adjusted very precisely, the surface of the skin can scab over as if it were burned black, or the underlying pigment can be stimulated and deepen. Is it possible to safely treat melasma like this, which is deeply embedded due to hormones or irritation, without the risk of side effects or pigment darkening?

Are there any moms or members who have consistently increased the number of melasma treatments due to stubborn spots that suddenly spread widely or after childbirth? I am curious about the actual timing and progress of how the spots lighten when combined with treatments like laser toning and skin boosters!