by Natalie Finn Tue., Feb. 12, 2013 4:04 PM PST
Lady Gaga can't go on this way.
The pop star revealed Tuesday via Twitter that a condition called synovitis, or severe joint inflammation, has left her unable to walk and she has been forced to postpone her next four shows.
"I've been hiding a show injury and chronic pain for sometime now,over the past month it has worsened," Gaga tweeted. "I've been praying it would heal." She continued: "I hid it from my staff, I didn't want to disappoint my amazing fans. However after last nights performance I could not walk and still can't."
Get a load of Lady Gaga's divalicious backstage requests
Concerts scheduled for Wednesday and Thursday in Chicago, Saturday in Detroit and Sunday in Hamilton, Ontario, Canada, have been canceled for now, with makeup dates to be announced later.
Gaga is hoping to resume her Born This Way Ball Tour next Tuesday in Philadelphia.
"To the fans in Chicago Detroit & Hamilton I hope you can forgive me, as it is nearly impossible for me to forgive myself. Im devasted & sad," she continued to tweet, adding, "It will hopefully heal as soon as possible, I hate this. I hate this so much. I love you and Im sorry."
Get better soon, Gaga!