Melasma is an acquired hypermelanosis skin disorder that commonly affects women than men. It is characterized by irregular light to dark brown macules occurring in the sun-exposed areas of the face, neck and arms.
It occurs most commonly with pregnancy and with the use of contraceptive pills.
Other factors implicated in the etiopathogenesis are photosensitizing medications, mild ovarian or thyroid dysfunction and certain cosmetics.
Solar and ultraviolet exposure is the most common important factor in its development.
Taking the oral extract product of the fern Polypodium leucotomos (PLE) on top of the standard topical hydroquinone cream and sunscreen reduces the severity of melasma to a greater extent compared with the standard treatment alone in Asian patients, a pilot study has shown.
Tranexamic acid shows potential in the treatment of melasma, demonstrating efficacy when used alone or in combination with other modalities while inducing relatively few side effects, according to a literature review.
Prominent members from the Malaysian Society of Allergy and Immunology (MSAI) and Dermatological Society of Malaysia (PDM) came together to establish a coalition called the Malaysian Urticaria Expert Group (MARTEG).
The risk of psoriasis is higher among current smokers, particularly those who smoke >25 cigarettes per day and for >20 pack-years, according to a Taiwanese population-based cohort study. On the other hand, alcohol consumption shows no significant association with psoriasis development.