A drunk Thai prostitute bit off pieces of a tourist's right earlobe and swallowed them in front of him.

The 55-year-old traveler was allegedly approached by Kannika Kamton, 25, who had boarded an open-back bus in Thailand while "severely intoxicated from alcohol."

She entered the car after it had stopped at a traffic light in Pattaya and then attacked the traveler inside.

Passengers allegedly watched in horror as the sex worker allegedly dug her teeth into the man's right ear lobe on Saturday, August 20.

As the victim screamed in agony, Kamton swallowed the chunk of flesh.

Kamton tried to run off before police were called, but she was seized by cops after being handcuffed to a truck.

She was then taken to the local police station to sober up.

The officers bandaged the holidaymaker's ear while he was "bleeding heavily" on the side of a busy road, before he was taken to a hospital for emergency treatment.

 Police Lieutenant Colonel Saijai Kamchula said: "An officer took control of the attacker, but she kicked the officer with her feet and resisted arrest, so extra help was needed to restrain her.

"The detained woman will be prosecuted." There were many witnesses, and the victim wanted to have the woman detained and prosecuted.

Kamton's motive for the alleged attack currently remains unclear.