Stepping out on Tuesday night in Mayfair, the 43-year old supermodel was met by a cold breeze which pushed back her hair to reveal thinning hair on each side of her head.
However Naomi's overall look was still as stylish as ever, in a long black coat, roll-neck, grey mini-skirt and studded ankle boots.
Collateral damage: Years of wearing weaves and
extensions has left Naomi with bald patches which showed up in the wind
on Tuesday night
In true diva fashion, Campbell left the Roko restaurant in oversized shades, and had opted for a silky black shoulder-length wig, with a blunt fringe.
The hairpiece nearly disguised (what experts call) traction alopecia, the condition caused by years of wearing weaves, over processing hair, and applying glues.
It can take between three months to a year for hair to grow back in moderate cases, but if the pulling continues the hair will never grow back and the only option is a hair transplant.
Tight dos: Experts say tight hairdos can contribute to the condition called traction alopecia
Still super: The model looked chic in a black outfit and oversized shades at dinner in Mayfair
This is not the first time Naomi has sparked concern with her thinning hair, as the supermodel, originally from Streatham, South London, has worn straight extensions over her naturally curly hair for a number of years.
Stars including Paris Hilton, Victoria Beckham, Britney Spears and Alexandra Burke are all reported to have suffered traction alopecia as a result of hair extensions.
Speaking in August 2012 about Naomi's thinning hair - which caused a media storm when she was spotted with a large reseeding hairline while on holiday in Ibiza - celebrity hair extensions expert Tatiana Karelina, said: 'The interesting thing to note is that traction alopecia doesn't progress like other hair diseases.
'At the initial stages it is reversible but prolonged tension may destroys the hair follicles and will not re-grow under any circumstances.
'It is unclear from the pictures if Naomi's condition is permanent but given the time that has passed since she was first spotted with this condition it is more than likely that the damage she has suffered is permanent.'
When extensions go wrong: Naomi displayed a large reseeding hairline while on holiday in Ibiza in 2012
