Mostly, your skin appear dull due to dead skin. You need to remove the dead skin to see the instant glow. To achieve the instant glow, you need to apply lemon and some salt.
You can sprinkle salt on lemon slice and then scrub your face. Do scrub for few minutes and then wash with normal water.
You can make a face pack. Mix some rice flour with honey and lemon juice and add some water if required. Apply this mask over the face and then wash it off for 15 minutes.
Lemons are rich in citric acid and vitamin C so it can help to brighten and lighten the skin when used over time. Vitamin C can help to remove tan, dark spots and age spots.
Apply lemon juice on your lips before bed time and wash it in morning. This will help to remove dead and dried skins. But, if you have any cuts then don't use this method.
Elbow and Knee bleacher:
If your elbows appear dark then rub it with half of a lemon