Need help, My face is darker than my body. I'm depressed. (photos)

Hello, I am 22 year old male with dry skin type living in India..My face is 5 shades darker than my body and my neck is 7 shades darker than my body.I'm having this skin condition for more than 10 years. Please give me exact diagnosis on what my problem is and probably need your help on which product works best on my skin to get rid of my skin problem. Here i am attaching my skin photos in the message

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