Lloyd Webber wrote the UK's 2009 Eurovision Song Contest entry
Composer Andrew Lloyd Webber has been re-admitted to hospital after developing an infection following surgery for prostate cancer.
A statement on his website said although the operation had been "successful" he had developed a "post-operative chronic infection".
It said the 61-year-old needed "immediate treatment" but hoped to be back at work in the new year.
Lord Lloyd Webber announced last month that he had been diagnosed with cancer.
The musician's new musical, Love Never Dies, is scheduled to open in London's West End in March.
It is a sequel to the phenomenally successful Phantom of the Opera production.
Next year, he will launch a new BBC show to find Dorothy and Toto for a new theatrical production of The Wizard of Oz.
Prostate cancer affects around 35,000 men in the UK each year and kills more than 10,000.
The disease is the most common cancer in British men, accounting for a quarter of all new cases.