Hi..
Welcome to HEALTHCARE MAGIC..
I have gone through your query and can understand your concerns..
As per your complain lip discolouration can occur due to excessive sun exposure, chapping and inflammation of lips, excessive use of harsh chemical containing makeup,
smoking etc..
First of all you should stop using all kind of chemical cosmetics over lips.
You can apply Koijc acid containing cream over the lips.
Apply
aloevera gel or petroleum jelly for lubrication.
Vitamin E capsules can be broken and gel can be applied on lips..
Exfoliate your lips twice a week.
Natural bleaching agent Lemon can be applied and a bit of common salt can be sprinkled on it so that it provides scrubbing action.
Application of honey can also help..
Do
cold compresses on lips.
Prevent sun exposure and if exposed always apply a lip balm containing Sun protect formula..
Drink plenty of water..
Hope this information helps..
Thanks and regards.
Dr.Honey Nandwani Arora.