Gina I heard Shahnaz Hussain swear by lemons to make the elbows/ankles/finger joints "less dark". Lemon is a natural bleaching agent and regular use will help lighten the skin. She said never to apply it to the face on its own. But you may apply it directly on elbows etc.
i also heard that applying lemom helps alot ...my elbows and knees and were really dark...and i hate it alot ...someone told me to use lemom and i started using it regularly and it helped alot