text: An 11-year-old Chinese schoolboy has become mute after he drank a glass of water which had been laced with perfume and chalk dust as part of a prank. Pupil Xiao Gao, from Fujian Province in south eastern China, has not said a word in five days after a classmate who had allegedly bullied him gave him the water, reports People's Daily Online. But medical experts are at a loss to explain his sudden inability to talk and say that the combination of water, perfume and dust - while nasty - should not have caused that type of damage. Pupil Xiao Gao, aged 11, (pictured) from Fujian in south east China, has not spoken a word in five days after a classmate he 'does not get on with' gave him the water which had been laced with perfume and chalk dust . Gao, who is in Year Two at Haidu Number 8 Middle School, is now awaiting further medical examination as well as an appointment with a psychologist. School officials told reporters that after Gao lost his voice the classmate who gave him the water 'became very afraid' and told teachers it was meant as a joke and that she did not think he would drink it. She said she only added perfume and chalk dust to the water - and not nail varnish as was rumoured. She said when Gao drank the water his classmates told him to spit it out but by then he had already swallowed it. Gao, who is a pupil at Haidu Number 8 Middle School, (pictured) is now awaiting further medical examination . Gao's form teacher was informed of his condition and immediately notified his family before taking him to hospital. The unnamed girl has now been excluded from the school. A doctor at Fujian Provincial Hospital told reporters that in all the years he has practised medicine he has never seen a case like this before. Qiu Bin Gaosu said as perfume consists mainly of alcohol, perfume fragrance and methanol, consuming a small amount would not impact the body, although a large amount would irritate the throat and stomach. He said consuming small amounts of chalk dust, which is nontoxic, should also not have this sort of effect. Xiao Gao's cousin told reporters that a number of doctors have seen Gao and they found no physical abnormalities. Gao claims the girl who gave him the water let him drink it and then said 'You will die after drinking this' Relatives told reporters that Gao's mother was ill and his father worked at a vegetable market. They said the boy was well-behaved and doubted the condition was a hoax - particularly as he had been unable to speak for five days. His form teacher, Mr Lin, said Gao was a little introverted, quiet and very honest and was often bullied by other children in his class. He said: 'Whenever a teacher saw any bullying we would chastise the offender and teach them about why their behaviour was not acceptable.' Gao's classroom - a doctor said that in all the years he has practised he has never seen a case like this before . Through written messages Gao told reporters that he was thirsty so he drank the water his classmate handed him - but after swallowing a couple of mouthfuls he realised something wasn't right. He claims it was then the girl took away the water and said 'You will die after drinking this.' Gao told reporters that he didn't get along with the classmate who handed him the water. The story has gone viral in China and has been reported on all the main news websites. The People's Daily reported that the local Public Security Bureau has started an investigation into the incident.
target: Schoolboy Xiao Gao, 11, drank water spiked with perfume and chalk dust .
  He has not spoken since the prank which went wrong five days ago .
  Doctors can't explain sudden voice loss and think it may be psychological .