True or False? Wearing a Ponytail in the Same Area Can Give You a Bald Spot

TRUE. "The effect is called traction alopecia. The constant tugging by a tight band can scar hair follicles and cause them to stop growing new hair," says Doris Day, a dermatologist in N.Y.C. She suggests switching pony positions daily to alleviate tension. Tie back hair with a soft elastic band and wrap the ponytail as loosely as possible, suggests Desai. It's not just ponytails that can be the culprit, either --- headbands, braids and barrettes may result in similar damage when repeatedly worn in the same spot.

True or False? A Cold Rinse Adds Shine and Tames Frizz

TRUE. A blast of cold water at the end of your shower can make hair appear shinier because it temporarily helps the cuticle flatten down onto the hair shaft, explains Desai. But the results might not last if you don't properly dry your hair. Make sure the cuticle remains flat by applying a deep conditioner or silicone-based product to seal it.