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. Expert suggested to switching pony positions daily to alleviate tension. Tie back hair with a soft elastic band and wrap the ponytail as loosely as possible. 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.
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Thank you a good tip to hand down to my children. Don’t want bald grandchildren.