The safest laser treatment for stubborn pigmentation depends on whether the problem is melasma, post-inflammatory hyperpigmentation, or sun spots, because each reacts differently to heat, wavelength, and skin tone. Key Takeaways For stubborn pigmentation, the safest laser is usually a low-heat, conservative option chosen after diagnosis, with Q-switched 1064 nm Nd:YAG and selected non-ablative fractional lasers generally preferred over aggressive pigment-targeting lasers in d