Take the 2 tbsp of fresh aloe vera gel. Squeeze the juice from the lemon and add 1 tbsp to the aloe vera gel. Instead of the lemon juice you can use the fresh tomato juice also.
Mix the aloe vera gel and lemon juice and add the pinch of turmeric powder to it. Apply this mix on the face and tan area. Let it dry for 20-30 minutes. Now wash off your face normal water.