Instead of using lacto calamine or any skin products.. Rather I would like to suggest to try with home remedies try to scrub on dark spots with lime juice. Lime juice is a natural bleaching agent and can lighten dark skin. Apply the lime juice to affected areas, and let it sit for 30 minutes. Then wash it off and moisturize the area.
Use this simple method on regular basis..I am sure you will get positive result..
Earlier I used to take medicines only for internal and hard disease that can not be cure with myself..like for pain relief used to take darvocet medicine from genericdarvocet.net.