Misconceptions about hyperpigmentation.

True. Hyperpigmentation is a pigmentation disorder, characterized by an overproduction of melanin by the melanocytes. It can manifest in various clinical forms, including the pregnancy mask (melasma) and age spots.

False! Melasma, often referred to as the "mask of pregnancy," is particularly common in individuals with darker and olive skin tones, as they tend to produce more melanin. It is characterized by patches that can appear on the forehead, nose, around the upper lip, chin, and cheekbones. It affects 70% of pregnant women, typically starting in the fourth month of pregnancy. Regardless of your skin type, it's important to protect yourself from the sun all year round and at any stage of life.

False! Melasma, also known as the mask of pregnancy, can occur in women who are not pregnant, as well as in men. It often forms following hormonal fluctuations during pregnancy, hence its nickname, or also when taking a medication that affects the hormonal system. Exposure to the sun or the use of oral contraceptives can also lead to the development of melasma.

False! Hyperpigmentation will always occur in the case of overexposure to the sun without protection. It is therefore essential to protect your skin against UV rays throughout the year, both summer and winter. Protection involves applying sunscreen evenly, even if you do not plan to expose yourself directly to the sun. Moreover, certain forms of hyperpigmentation, such as melasma, have hormonal origins, which, even when treated, can reappear due to hormonal relapses.

It's true! Freckles are caused by hyperpigmentation of the skin. However, the mechanism of their appearance involves a different type of melanin, known as pheomelanin. The freckles usually appear during the first three years of life, while sunspots intensify and become increasingly numerous with age. Moreover, freckles have a genetic origin, which is not the case for sunspots.

False! The treatment of pigmented spots is not only done through invasive methods, such as peeling, laser, or even drug treatments. Topical treatments have shown their effectiveness in treating pigmented spots. Certain active ingredients such as arbutin or tranexamic acid act on tyrosinase, the enzyme that activates the production of melanin, by inhibiting its activity.

Other active ingredients such as niacinamide inhibit the transfer of melanosomes to keratinocytes, which is responsible for the pigmentation of the epidermis. There are now serums and creams with exfoliating actives (AHA or BHA) that help to reduce the appearance of pigmented spots. These molecules eliminate keratinocytes by breaking ionic bonds, thus destabilizing the stratum corneum and causing its gradual detachment.

True and false. Pigment spots are one of the consequences of overexposure to the sun, thus they appear with age. They are referred to as "age spots". However, other types of pigment spots are not related to age, such as melasma.

True. A study on melanocytes exposed to artificial blue light showed a significant darkening of extracellular and intracellular melanin pigments. However, further studies will be conducted to clearly explain the effect of blue light on hyperpigmentation.