ʻO ka lāʻau lapaʻau o ka epidermis a me ka pigmentation dermis
Me ka hoʻohana ʻana i ka hopena pahū o ka laser Nd: YAG, ua komo ka laser i ka epidermis i loko o ka dermis e komo pū ana ka nui o ka puaʻa. No ka mea, ʻo ka laser pulse i nanosecond akā me ka ikaika kiʻekiʻe loa, ʻo ka pua puaʻa pana pua e pehu koke a haki i nā ʻāpana liʻiliʻi, e hoʻopau ʻia ma o ka ʻōnaehana metabolic.