Police were called to reports of an assault at a property in Hobart Road at 4pm on Sunday.
Armed officers were sent to the scene and police detained a man in his 20s.
A spokesman for Norfolk Constabulary said: “A man in his 20s has been arrested on suspicion of assault, threats to kill, intentional strangulation, coercive and controlling behaviour and possession of an offensive weapon.”
He is being questioned at Wymondham Police Investigation Centre.
Eyewitnesses said there was a heavy police presence in Loddon on Sunday evening.
One man said: “There were at least two police vans and two cars in the Drury Lane area, and there were separate reports of armed police and dog units at the estate near Loddon vets.”