Police were called to a Liverpool street after a man was slashed on Saturday.
Officers arrived in Hey Green Road in Wavertree following reports a male had been injured.
On arrival, patrols found a man with a "minor slash injury".
He is not co-operating with enquiries.
A knife was recovered in the aftermath and will now be forensically tested.
A teenager arrested on suspicion of wounding is facing no further action, while a 31-year-old woman has been charged with possessing a sharp pointed article in a public place.
Kayleigh Graham, 31 and of Burnthwaite Road in Knotty Ash, was released on bail and is due to appear at Liverpool Magistrates' Court next month.
*Anyone with information on the possession, storage and use of weapons is asked to call Merseyside Police on 101 or Crimestoppers, anonymously, on 0800 555 111
