R&B singer Maxwell has cancelled his short U.S. tour after developing vocal swelling and hemorrhaging. A representative for the singer said Friday that he has been advised by doctors to rest and undergo treatment. Maxwell’s six-date summer tour had shows planned for Los Angeles, Atlanta and Newark, N.J. for July and August. Maxwell said in the statement that cancelling the tour “sucks” and he plans to hit the road when his new album, “blackSUMMERS’night,  ” is released later this year. The 39-year-old made his return to music in 2009 after a seven-year break with the platinum album “BLACKsummers’night.  ” It won the singer-songwriter two Grammy Awards, among other accolades. The statement also said refunds are available at the point pf purchase … Thats horrible. Unfortunately I happen to notice with some of the artists over the past few years that seem to be straining or croaking when they sing live (think Alicia Keys), sometimes end up with vocal problems. I had seen a couple of live performances of his and he’d have this moment mid song where he sounded hoarse like he was forcing himself to get it out.  I hope he rests and gets better soon (and releases those other albums he was tellin us about)