Christel Stainfield-Bruce, 36, was approached by a yob in Islington, north London, on Friday afternoon who initially asked her for directions.
The yob than demanded her phone after Christel said “no” he stabbed her in the thigh before fleeing empty-handed.
Christel was rushed to hospital she was lucky the knife missed a major artery.
The mum of three said “It feels so unnecessary.
“There was no gain, he didn’t even get my phone or bag or anything, but it must be a symptom of a wider problem.
“What is the state of the country when young children are causing a big wound to people they don’t know, with people you’ve got no history with? What’s going through the these people’s heads?”
The mother-of-three said she was surprised by how young her attacker – thought to be between 14 and 16 –
A spokesman for the Met Police said no arrests had been made.
Officers are hunting for the suspect was 5ft 3in tall black male of large build, wearing dark-coloured clothing, including a jacket and trucker-style cap.