welcome to HealthcareMagic forum,
I guess you are talking about getting dark circles
.These are multifactorial and don't have one reason.It might be because of iron deficiency
,stress,excess sun exposure,familial etc.
So, you need to improve your iron uptake(eat green leafy vegetables),take good seep in night, do yoga to relieve stress, drink 10-12 glasses of water daily & use a good sunscreen to protect from sunlight .Along with this you can use hydroquinone
based creams to lighten up the color.
consult a dermatologist
who can help you select a good cream .