Causes of melasma
Pregnancy mask occurs due to an overproduction of melanin, the pigment responsible for the colour of the epidermis, by the melanocytes, the cells specialising in tanning, which are in a state of hyperfunction. The hormonal upheaval caused by pregnancy and increase in hormone levels, particularly oestrogen, is responsible for this excessive production of melanin. The type and location of exposure to the sun's rays also plays a role in its occurrence. Be aware that even a very low level of sunlight is enough to cause pregnancy mask to appear. Genetic factors may also play a role in the appearance of pregnancy mask (phototype, family history, etc.).