Discomfort during pregnancy
During pregnancy, some women develop brown splotches on their forehead and cheeks and above their upper lip: this is what is known as a “pregnancy mask” or chloasma, a hormone-induced hyperpigmentation that sometimes accompanies pregnancy. Women with dark hair are especially predisposed to this.
The only thing you can do to prevent it is stay out of the sun or apply a very strong sunscreen. If a pregnancy mask forms in spite of your efforts, you can take comfort in the fact that it most often fades by itself a few months after the birth. If it does not fade, visit a dermatologist, who can prescribe an effective treatment.