TAKE A BREAK
If overplucking or age has left your brows sparse, first try to resist tweezing them at all for a few months so you can see what you've really got to work with. Sometimes the habit of tweezing is so ingrained that you do it daily without realizing how much you're taking away. You may rediscover the natural beauty of your youthful brows.
FILLING IN OVERPLUCKED BROWS
Bald patches can be filled in by brushing the brows upwards and then filling in the sparse area with shadow powder that's a shade lighter than your natural brow colour. Finish by going over the area with a pencil that matches your brow colour, using short, hairlike strokes.