Tasmania Police report a woman sustained injuries to her face and hand following an alleged dog attack about 2pm on Saturday.

The woman who witnessed the incident, and wished to remain anonymous, said two dogs she believed to be bullmastiffs ran past her and towards the woman in an on-leash section of the beach.

"They ran straight past me and my little dog to her, and all I could hear was screaming. I have never seen dogs so huge. She was screaming and her dog was yelping.

"I picked my dog up and ran. I thought there was no way I could have helped, these dogs were huge.

"I kept running and looked for somewhere to hide. I thought they were going to come after me and my dog."

The witness said one of the dogs reached her car just after she did.

READ MORE: Alleged Ravenswood murderer enters plea

"I had seconds to spare," she said. "I jumped in and it circled my car a couple of times."

The witness said another lady went down to the beach and helped the woman who had been attacked.

A police spokesman said Ulverstone police were investigating the alleged incident. The woman said she felt compelled to speak up.

"One of my concerns is there are little kids around there and these dogs now have a taste for human blood," the woman's husband said.

READ MORE: Woman scarred by health band after it caught alight overnight

"We were hoping someone from the public would be able to identify the dogs and who the owner is and whether they are registered.

"From a public protection point of view it is absolutely vital that we get it out to the public for someone to identify them."

Central Coast Council general manager Sandra Ayton said the council would be investigating the incident.

"We are concerned about the woman and her wellbeing," Ms Ayton said. "Dogs should always be with their owner and under the control of their owner."