The knives came out during an argument between a boyfriend and a girlfriend on the south side overnight, 1200 WOAI news reports.
The woman showed up about 10:30 Friday night at Southwest General Hospital with her finger cut off.
She told police her boyfriend had slashed her at a house in the 600 block of West Pyron.
When police went to the home, they found that the boyfriend had been stabbed twice in the back by the girlfriend.
He was rushed to University Hospital in critical condition.
She is hospitalized as well, and police are trying to sort the whole thing out.