British singer-songwriter Morrissey performs, February 24, 2012. (REUTERS/Eliseo Fernandez)

Singer Morrissey is in hospital suffering from pneumonia in both his lungs.

The former The Smiths star has cancelled a string of dates on his current U.S. tour, citing health issues including throat condition Barrett's oesophagus and a bleeding ulcer.

He returned to the stage in San Diego, California last month but the British star has since postponed another show and revealed he is suffering from the potentially life-threatening lung condition.

Morrissey is currently being treated for double pneumonia by medics at a hospital in San Francisco, California but insists he plans to be well enough to perform at the Vive Latino Festival in Mexico on March 14.

A statement from Morrissey's representative reads, "Morrissey is presently being treated in San Francisco for 'double pneumonia', but remains on course to headline the Vive Latino festival in Mexico City on March 14."

Morrissey's postponed show at the Regency Ballroom in San Francisco will now take place on May 1.