It's feared a number of patients who underwent cosmetic treatments with an unregistered Sydney practitioner may be infected with blood-borne viruses.
NSW Health has issued an alert urging anyone who received treatments from a business run by Ms Pu Liu, or Mabel Liu, in Sydney's inner west to see their GP for blood tests.
Ms Liu, who performed the procedures in a residential apartment in Five Dock, used injectable drugs not approved for use in Australia, NSW Health said.
There's a risk her equipment and medications may have also been contaminated because of poor hygiene and lack of sterilisation of the equipment used on clients.
"Client records are not available from Ms Liu to identify people at risk, so we are urging anyone who used her services to see their GP for advice and to seek tests for hepatitis B, hepatitis C and HIV as a precaution," NSW Chief Health Officer Dr Kerry Chant said on Wednesday.
Public health officers raided Ms Liu's business this year following a complaint from one of her clients.
She was issued with two prohibition orders from the NSW Health Care Complaints Commission (HCCC) including a ban on providing anymore cosmetic and medical procedures or possessing any drugs used for cosmetic treatments such as botox or dermal fillers.
No criminal charges have been laid against Ms Liu as her business is still being investigated by the HCCC, a NSW Health spokeswoman told AAP.
Dr Chant meanwhile urged Ms Liu's patients to undergo a blood test.
"An infection may not present with symptoms right away, so the only way to know if you are at risk (of blood-borne viruses) is to have a blood test," she said.
She's also urged anyone considering having a minor cosmetic procedure to make sure they check a practitioners credentials before undergoing treatment.
The HCCC last week issued a warning about cosmetic services being offered by unregistered practitioners through social media sites such as WeChat - a popular platform in the Chinese community.
