"The concern many young people have that use DIY methods to treat themselves is that they are being arrested and charged, as well as their concerns are related to personal security, retaliation and retaliation," he told LBC radio.
"This is something that happens all too often in London. It is the victims of knife crime that treat these kinds of woven parynels or even super glue. I have heard stories of people using scalpel."
Khan continued: "The two main reasons given by experts are: One concern that they could be arrested, accused, prosecuted, but secondly, they are worried that someone is turning to A & E (emergency room) or gang B. trauma center. "
Khan – who joined in 2016 – said that violent crime has risen both in London and across the country since 2014. In response to criticism that knife crime has spiked during his term of office , Khan said cuts to police numbers in the British capital began under his predecessor (and now the frontrunner in the conservative party's leadership) Boris Johnson.
During the interview, Khan held a curved hair tissue as an example of the type of tool used.
"We have also heard examples of people using super glue and using scalpel pins to remove shotgun pellets. Just think of the complications that could be from internal bleeding and from infection. But you also do not receive the specialist you need from clinicians, but also policemen and youth workers, "Khan said.
"My message to a young person or big brother or sister, uncle, aunt, mother or father who knows someone who treats herself – it's so dangerous. Honestly, the possibility of infections, the possibility of internal bleeding – it is just not worth the risk you take in terms of self-treatment.
He added: "You take a risk with your own life, you take a ride with your child's life by letting him or her self-treat. "
CNN's Rob Picheta contributed to this report.