PHOTOS: Naomi Campbell's Bad Hair Day

Supermodel Naomi Campbell suffered a bad hair day -  to say the least - on a New York fashion shoot after she revealed a huge bald patch underneath her luscious long wig, RadarOnline.com can reveal.

Onlookers were left stunned on Monday after Campbell - who is known for throwing temper tantrums – showed the true extent of her vanishing hairline.

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They got a peek of her horrible hair condition as she held her tresses back while a stylist adjusted her clothes at the shoot for designer Dennis Basso.

It appears the 40-year-old is suffering from a condition known as ‘traction alopecia’ which is associated with braiding, weaving and extensions.

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The tight traction can cause hair breakage and other celebrities like Britney Spears, Paris Hilton and Victoria Beckham, have all suffered from it in the past.

While the condition can cause permanent hair loss,  it is reversible if caught early enough and treated by hair specialists.

Trichologist  (hair expert)  to the stars Philip Kingsley said tight hair styles, pony tails, hard brushing and hair extensions could all lead to traction hair loss.

He told the Daily Mail newspaper: “The old-fashion hair extensions were put in by weaving threads which had hairs attached to them between the natural hair.

“They were weaved next to the scalp and tightly knotted at each end to secure them.

“Because of their proximity to the scalp, the thread, which the hair knotted onto it, rubbed on the scalp, caused irritation, consequently making it sore and sometimes breaking the skin.”

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Knight also revealed that the new way to put in hair extensions, which involves glue-heating them onto natural hairs, could cause similar problems with clients.