Hello.. Since 4 months i was feeling my lips are getting darker day by day.. I and my family members too had pigmentation problem, mostly on back of the neck.. I was using kojitin and deriva ms for that after consulting Dermatologist. Iam using lip moisturizer and also lip lightening cream named as lipz as suggested by dermatologist. Iam not a makeup freak. Most of the times Iam being natural. So no issues with the lipsticks. Kindly suggest me some medicine or the reason behind darkness of my lips. Thank you.