Video showed the First Minister without a face mask during an SNP local election campaign visit to a barber shop on Saturday.
Strict rules north of the border were still in force making face coverings in hair salons mandatory. They will finally be relaxed today.
If found to have broken the law, Miss Sturgeon would face a £60 fixed penalty notice.
She has repeatedly called on Boris Johnson to resign following his fine for breaching lockdown rules.
The SNP claimed Miss Sturgeon was without her tartan mask only momentarily.
Now you see it: Nicola Sturgeon seen wearing a mask in the barber shop in East Kilbride, South Lanarkshire, on Saturday. The legal requirement to wear a face mask in indoor settings in Scotland moves into guidance on Monday
Now you don’t! Ms Sturgeon without the covering as she poses for a picture with another customer
First Minister Nicola Sturgeon has been reported to the police after being seen not wearing a mask during a visit to a barbers in East Kilbride, South Lanarkshire, on Saturday
Footage showed the First Minister without a covering during a visit to a barbers in East Kilbride, South Lanarkshire, while on the council elections campaign trail on Saturday.
It shows Ms Sturgeon mingling with customers and patting the head of a man in a barber’s chair while mimicking the sound of an electric razor.
A spokesperson for Police Scotland said yesterday: ‘We can confirm that we have received a complaint which is currently being assessed.’
Scottish Conservative health spokesman Dr Sandesh Gulhane MSP said: ‘The video clearly shows Nicola Sturgeon isn’t practicing what she preaches on facemasks.
‘She’s happy virtue signalling for official photos but behind closed doors it’s clear she doesn’t believe in her own rules so why should anyone else.
‘This is blatant hypocrisy from the First Minister who has now shown her true colours.
‘The public, who have been under these legal Covid restrictions for over two years, deserve an apology for this rule break.’
In an official video posted to her Twitter account, Ms Sturgeon was seen wearing a tartan face mask during a visit to the Iconic Gents Hair barbers shop while shaving a man’s bears.
A spokesperson for the SNP said: ‘The First Minister was invited into the barbers during an outdoor visit on the street.
A spokesperson for the SNP said the First Minister, pictured here during local election campaigning at Dundee Law on Friday, ‘immediately put it on’ upon realising she wasn’t wearing her mask
‘Within a few seconds, she realised she hadn’t put her mask back on and immediately put it on.’
It comes after Ms Sturgeon was forced to apologise when she breached Covid rules by taking off her face mask at a funeral wake in December 2020.
She described it as ‘a stupid mistake’, and said ‘I’m really sorry’.
The Scottish Government said the incident on Saturday was an issue for the party.