Hello,
The dark colored spot on lip could be oral melanotic macule and the white bump raises the possibility of Fordyce spots. Oral melanotic macule is a non-cancerous (benign), dark spot found on the lips or inside the mouth. A biopsy has to be done and laser treatment is the main treatment option. Fordyce spots are small yellowish-white granules on the inner surface and border of the lips.
Treatment of Fordyce spots includes CO2 laser or electro desiccation, TCA chemical peels(temporary treatment),diathermy or laser vaporization.
I hope this helps Take care and please do keep me posted on how you are doing or if you have any additional doubts. Kind regards.