Police trying to identify a woman who died after being dumped at a hospital in Perth's northern suburbs have released a description of her and images of several tattoos found on her body in a bid to solve the mystery.

The woman was left at the emergency wing of Joondalup Health Campus shortly after 3:00am on Wednesday.

The woman had several other tattoos, including one on her right wrist. ( Supplied: WA Police )

It is believed the woman was pushed out of a car which then sped away.

She was pronounced dead soon afterwards.

Police have described the woman as being in her early to mid-30s, of medium-to-large build and average height, with medium-length dark hair and a nose ring.

She was wearing jeans and boots with a large wedge heel, and a black T-shirt with a white motif.

The woman had several distinctive tattoos including a Lion King tattoo on her left forearm, an Asian script on her left foot and dates for 2009 and 2011 on her legs.

Acting Police Commissioner Stephen Brown said police hoped the tattoos might be recognised.

"The woman is not identified," he said.

"She's got a number of tattoos which might enable the police to more swiftly identify who she is.

"It's obviously a tragic set of circumstances. And we're working very hard on that ... to get to the bottom of it, and I'm sure we will."

Police have yet to reveal the cause of death and are searching for the vehicle that dropped her at the hospital.

Anyone with information is urged to contact Crime Stoppers.