The arrested woman will appear in Whangarei District Court later this month charged with injuring with intent to injure.
Meanwhile, a police sergeant was punched in the nose three times while arresting a man on Sunday morning, police said.
Senior Sergeant Howard Clement of Whangarei police said a 30-year-old man and a 23-year-old woman were involved in a domestic dispute early on Sunday when police arrived and asked the pair to calm down.
Mr Clement said the man allegedly punched the officer three times. The woman also allegedly assaulted an officer.
The man was arrested and charged with disorderly behaviour, obstruction, resisting arrest and assaulting police, while the woman was charged with assaulting police and obstruction.