why my face suddenly become dark

Sudden changes in skin pigmentation on your face can be perplexing and may have several potential causes. While sun exposure can often lead to a darker complexion, you’ve ruled this out by using sunscreen and not increasing your time outdoors. Given that only your face seems affected, this might suggest a change in pigmentation, known medically as melasma, which can indeed be triggered by hormonal fluctuations. Even if your menstrual cycles appear normal, subtle hormonal shifts often occur due to oral contraceptives, stress, or thyroid conditions, which can affect skin pigmentation. Furthermore, recent use of any medications, or exposure to photosensitizing agents could also play a role. It’s crucial to consider less common but possible underlying health conditions like Addison’s disease, which can cause skin changes but would be accompanied by other symptoms like fatigue or weight loss. Since the changes you’re noticing are isolated to your face, it might be advisable to see a dermatologist who can evaluate for melasma or other dermatological conditions. They might recommend topical treatments like hydroquinone, retinoids, or procedures like chemical peels that could help lighten the affected areas over time. In the meantime, continue using broad-spectrum sunscreen with at least SPF 30 to prevent further change. And, if any new symptoms appear, don’t delay in consulting a healthcare provider to rule out other potential causes.