Hi..
Can understand your lips..
As per your complain dark lips in individuals with dark complexion is not an abnormal finding but in case if the darkness has increased over the time it can be due to excessive exposure to sun leading to chapping and darkening of lips due to
melanin pigmentation..
Other reasons for darkening can be
smoking,UV radiations,too much intake of caffine,allergies etc..
You can rub honey to your lips at night time as they help in lightening the colour of lips..
You can scrub your lips with a slice of lemon with salt on it as it will act as a scrub and lemon also has a bleaching action..
Beetroot juice can also help in lightening the lip colour..
Orange peel scrub also helps in lightening the lips..
You can apply ice packs over the lips as they help in improving the blood flow of the lips and improve the tone and colour..
You should always apply SPF 15 containing lip balms over the lips to preven sun damage.
Avoid caffine and smoking..
Drink plenty of water to maintain hydration and prevent drying of lips..
Avoid sucking the lips..
Avoid heavy chemicals and
steroid based creams on lips..
Hope your query is solved..
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Thanks and regards..
Dr.Honey Nandwani Arora..