Classical singer Russell Watson has been re-admitted to hospital a week after an emergency operation to remove a brain tumour.
Russell Watson has put any recording on hold
"Russell was rushed back into hospital in Manchester this morning," said a spokesman for the star.
"He has been suffering from dizziness, headaches and blurred vision... he is currently undergoing tests," he added.
Watson had the benign tumour removed in a London hospital after falling ill while recording an album in the US.
The singer, 39, was examined in Los Angeles at the end of last month after developing severe headaches and impaired vision.
He had to wait two days to find out if the tumour was malignant or not, during which he carried on recording before flying back to the UK.
The operation took place at St George's Hospital in south London.
The tumour, called a pituitary adenoma, was removed through Watson's nose said Bill Holland, managing director of Watson's record label, Universal Classics and Jazz.
A spokeswoman at the time said Watson was resting and had been told by the doctor he would make a complete recovery.
The singer put further recording on hold while he recovered from the operation but he was still expected to go on tour in the UK in November and December.
The Salford-born tenor, who used to be a factory worker before he turned to singing, has sold more than four million albums worldwide.