Since the amount of hair follicles your have never changes, you unfortunately cannot grow more eyebrow follicles. The same goes for hair follicles. Eyebrow hair loss can happen for a variety of reasons including over grooming (over tweezing, bleaching, etc), diet, and medical conditions. If you have experienced a sudden loss of hair or a large life change, you may want to consult with your physician first to rule out any underlying medical conditions. If after consulting with your physician, you think your thinning eyebrows because of over grooming, hair restoration is the best option to make them look thick and full again.
If you are considering eyebrow restoration or just want more information, you can set up a free consultation with a Bosley Professional A Bosley Professional can help explain the variety of options for eyebrow restoration that are available and will create the natural looking fullness you want.