Blackness of the face and excessive facial hair are often linked to hormonal abnormalities, especially Polycystic Ovary Syndrome, where increased male hormones can cause skin darkening and unwanted hair growth. Other factors include insulin resistance, obesity, UV exposure, and genetics. Even while controlling weight, using sunscreen, and practicing good skincare will help, it's important to see a doctor to check hormones and receive the proper therapy, such as pills or lotions to minimise both pigmentation and hair growth.