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Even supermodels have bad hair days, but from the looks of this recent photo, Naomi Campbell appears to be dealing with something far worse.

A photo of the 42-year-old beauty vacationing in Ibiza earlier this week shows what appears to be a receding hairline.

Florida hair surgeon Dr. Alan Bauman, who has not treated Campbell, said the former supermodel appears to be suffering from traction alopecia - hair loss due to extensions.

"Extensions, weaves, anything artificial hanging on hair - no matter whether you attach it with glue, special magnets, tape - it's going to cause damage over time," Bauman told ABCNews.com. "And unless you give your hair a break from those extensions, it won't rebound."

Bauman said the weight from extensions pulls on a person's natural hair over time, causing it to rip out by the root. The hair follicle can be damaged or destroyed - in some cases, permanently. In the latter case, the only option is a hair transplant, which involves moving healthy hair follicles from one part of the scalp to the damaged area.

It's unclear whether Campbell's damaged hairline is permanent, but two years ago pictures of the British-born model surfaced showing a similar bald patch along her hairline.

"Being in the public eye and beauty business, her hair has to look amazing 24-7, and she's worn extensions for many years - decades even," Bauman said. "I guess you could call it a hazard of the job."

Ironically, August is hair loss awareness month, and, with this latest photo, Campbell may have unwittingly become its poster child.