Patients with dark skin will be very bad if they have melasma. When instructing patients on how to protect themselves from the sun, the following points must be reminded: 1. The sun protection index (SPF) is only for UVB and has nothing to do with UVA, which is an important factor in the formation of melasma and can even penetrate the glass of windows. If patients are driving, sitting next to a car window, or not in contact with the sun, patients are reminded that they still need to defend against UVA and UVB every day. 2, need to apply sunscreen every day, even in cloudy, snowy and rainy days, there are still UVB rays. Sunscreens with “broad spectrum” labels may not isolate all UVB bands Anthelios brand sunscreens (with Mexoryl) and Neutrogena sunscreens (with Helioplex) basically isolate the UVB bands including UVA and UVB. 4.Heat radiation will accelerate the formation of melasma If patients are placed in a working environment with heat radiation, such as barbecuing by a hot stove, heat radiation will contribute to the formation of melasma. 5.Computer screen will radiate a small amount of ultraviolet radiation. It is recommended for melasma patients to buy computer anti-radiation goggles. 6. Color-changing bracelets and beads with UV monitoring function can assist in monitoring the UV content of some specific areas. With the help of these devices, patients can monitor the UV content at home, in the work environment and in the car. 7, it is difficult to buy sunscreen with a high broad-spectrum sun protection index Most sunscreens leave a white or gray residue on dark skin. Sunscreens containing titanium dioxide nanoparticles and zinc oxide minimize white residue and thus become more attractive skin care options. Similarly, the cosmetics market has developed sunscreens with a high SPF, including, for example, Laura
Mercier) brand isolation cream and repair super sunscreen, both sunscreen contains a small amount of base color, can reduce the white residue on dark skin. 8. Strict sun protection is required during treatment Before implementing treatment for melasma patients, you should first ensure that the patients strictly follow the sun protection recommendations or else they will not be treated. This is because laser, whitening products, retinoic acid and other drugs as well as chemical peeling will enhance the sensitivity of the skin to ultraviolet rays, which will lead to deterioration of the condition if not strictly protected from the sun.