I have a dark spot on mouth and nose .what is the reason for dark spot I have white heads on nose due to that I have dark spot
Dark spots also known as hyperpigmentation,can occur due to several reasons. Sun exposure,post inflammatory hyperpigmentation which appear after inflammation or injury to skin like acne etc. Some individuals are genetically predisposed to hyperpigmentation.To prevent this use sunscreen and avoid picking at acne or injuries to minimise damage.Consult a dermatologist for a proper diagnosis and treatment plan tailored to your specific needs.