Brief Answer:
Kindly upload images, please
Detailed Answer:
Hello. Thank you for asking,
I am Dr. Kakkar (Dermatologist and Venereologist). I have noted your concern.
Perhaps you have developed either post inflammatory hyperpigmentation/depigmentation Or lip vitiligo.
I'd request you to kindly upload an image/photograph of the affected area in the "Reports Section" of this web-page so that I am able to confirm and guide you better.
Awaiting...
Regards