Former Smiths frontman Morrissey has cancelled more shows in his U.S. tour as he seeks treatment for a bleeding ulcer.

He was taken to hospital in Detroit on Jan. 26, and had to postpone six U.S. concerts in early February.

Morrissey, whose hits include First of the Gang to Die and Irish Blood, English Heart,  is undergoing treatment for the bleeding ulcer and Barrett's esophagus, a condition that can lead to cancer.

He had hoped to resume his concert tour Wednesday in Las Vegas, but issued a statement Monday saying he needed more rest.

In an online message earlier this month, he joked: "There are now no known ailments left for me to try."

He signed it off by adding: "Pause at my headstone, Morrissey."

Morrissey kicked off his U.S. tour in January with a performance of Action is My Middle Name on The Late Show with David Letterman in New York.

The 53-year-old now says he is unable to return to performing until Feb. 21, when he has a concert planned in Denver.