One of the UK's top hair specialists says there's been an increase in the number of women seeking help over damaged hair after using extensions.
Steve O'Brien, a trichologist at The Institute of Trichologists, says there's been a 15% increase in the last two years.
He says it's down to women using glue in extensions.
The Trichology Society is calling for them to be banned, because of the damage they do to women's hair.
Mr O'Brien says it doesn't help that celebrities make wearing extensions and maintaining them look easy.