A teenager has been arrested after a man was allegedly stabbed multiple times in the head.

Emergency services rushed to a unit on Sir Thomas Mitchell Road in Chester Hill in western Sydney just after 12.30pm on Wednesday after receiving reports about a stabbing.

Police discovered a 46-year-old who was bleeding due to a wound on his head.

NSW Ambulance paramedics treated the man at the scene for stab wounds to his neck, face and head before being taken to Liverpool Hospital in a stable condition.

“The injuries are not considered to be life-threatening,” a police spokesperson said.

A NSW Police spokesperson said inquiries were continuing.

Officers later arrested a 19-year-old man on nearby Orchard Rd and have taken him to Bankstown Police Station.

A crime scene has been established and police have appealed to anyone who may have information or any available footage to come forward.