“She is under suspicion of attempted murder,” said Hesam Akbari of the south Stockholm police to newspaper Metro.
The man was found staggering into a dental clinic in the Stockholm suburb of Norsborg on Tuesday around lunch time, bleeding profusely from a severe stabbing wound.
Police were alerted to the scene but found the man at first unwilling to report the incident or cooperate with investigating officers, according to the paper.
However, it later transpired that the stabbing had taken place in a nearby apartment, and that the man had made his way from the scene of the crime, most likely to seek medical help.
Officers arrested the 23-year-old woman in the flat and another woman was brought in for questioning, believed to have witnessed the event.
According to Metro, the man was also questioned by police late on Tuesday evening but the nature of the relationship between the stabbed woman and her victim is not yet known.
“The motive is a little unclear,” said Akbari to the paper.
The police have reportedly cordoned off the apartment and a forensic investigation is being carried out on the scene of the incident.
The stabbed 29-year-old is being treated in hospital and his condition is not believed to be life-threatening.