Dear user, first and foremost you have to stop smoking. Various depigmenting creams may be used depending on type and severity of pigmentation. Some aesthetic procedures may also be undertaken like - chemical peeling, microdermaabrasion, etc.
Next Steps
Kindly consult through Practo direct and share pictures of the affected area
Health Tips
Avoid smoking. Avoid sun exposure. Keep your lips moisturised with a lip balm with SPF .