Lexington police said they got a report early Wednesday morning about an incident taking place at 417 Hawkins Avenue.
When they got there, they said they found 30-year-old Aisha Briscoe with a small knife wound behind her left ear.
Robert Ervin, 58, was arrested and charged with assault.
Police said both of them had been drinking and taking drugs.
They also discovered Briscoe was wanted on outstanding warrants, so she was taken into custody as well.