Riehl melanosishttps://en.wikipedia.org/wiki/Riehl_melanosis
Ko te Riehl melanosis he āhua o te mate paheketanga, ka timata mai i te pruritus, erythema, me te papura ka horapa haere, ka tae ki tētahi wāhanga, ka noho tonu. Ko te mararatanga o te rā i muri i te whakamahinga o ētahi hinu kakara, kirīmi rānei, te take o te mate.

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      References Riehl Melanosis 32491369 
      NIH
      Ko te Riehl melanosis, e mohiotia ana ko te mate paopao whakangao. He momo mate kiri nā te paopao pawera; i te nuinga o te wā ka puta mai i te kakara me ētahi atu matū kei roto i ngā taonga whakapaipai. Ahakoa te whakarōpūtia hei momo dermatitis, ka whakaatu a Riehl melanosis i ngā huringa whakangao i te kiri, he iti noa ngā tohu o te irirangi. He nui ake te āhua o te kiri pouri i te nuinga o te tangata. Kua tirotirohia e ngā rangahau tata nei te whaihua o te mid‑fluence QSNY 1064‑nm maimoatanga laser mō te whakatika i te whakangao hohonu e pā ana ki te Riehl melanosis. I tētahi rangahau anō, i whakakotahitia ngā rongoā rerekē, tae atu ki te low‑fluence 1064‑nm Q‑switched Nd:YAG laser, kirīmi hydroquinone, me te wai tranexamic waha, ā, i hua ake te whakapai ake mō te nuinga o ngā turoro.
      Riehl melanosis (RM), commonly called pigmented contact dermatitis, is considered an acquired form of allergic contact dermatitis, typically to fragrance and other ingredients of cosmetic products. Although it is considered as a dermatitis, it presents clinically with hyperpigmentation over the face and shows pigment incontinence with minimal eczematous changes on histology. The condition is more commonly seen in dark-skinned people, causing an important psychosocial impact. A recent study showing the higher effectiveness of mid-fluence QSNY 1064-nm laser in targetting the deep pigmentation of RM has also been conducted. Another study used a combination of therapies to include low-fluence, 1064-nm, Q-switched Nd: YAG laser, hydroquinone cream, and oral tranexamic acid, with the majority of patients experiencing significant improvement.
       Research Advances in the Treatment of Riehl’s Melanosis 37168093 
      NIH
      Ko te Riehl's melanosis he momo mate kiri e pā ana ki te pa ki te rangi me te pa ki te rā. Ka tere, ka tere haere te piringa o te kiri, ā, ka tino pā ki ngā turoro o te hinengaro me te tinana. Ahakoa kāore anō te take tūturu o te Riehl's melanosis i te mōhiotia, e tohu ana ngā rangahau o nāianei i tētahi hononga kaha ki te rongoā mate. I te maimoatanga, kua whakamātauhia ngā rongoā tuku iho me te rongoā taiaho, tae atu ki te whakamahinga o ngā mea whakangao ki te kiri. Ko te rongoā taiaho, arā te whakamahi i te laser Q‑switched Nd:YAG, kua whakaatu i ngā hua pai mō te Riehl's melanosis. Ko te whakakotahi i ngā huarahi maimoatanga rerekē ka hua i ngā hua pai.
      Riehl's melanosis (RM) is a contact photodermatitis, with fast progressive gray-brown skin pigmentation as the main manifestation, which can seriously affect the psychology and physiology of patients. Currently, although the etiological factors of Riehl's melanosis is still be unknown, the existing literature proves clearly the cause of it is related to the contacting with suspected allergens. For decades, there has been no standard method for the treatment of RM, but with both conventional drug therapy and laser therapy having been attempted. Topical application of bleaching agents is mainly used as an auxiliary treatment modality. The laser treatment modality remains a hot spot, among which Q-switched Nd:YAG laser is well received for RM. Positive outcomes have been achieved by the combined treatment modalities attempted in recent years also achieve positive outcomes.