Amanda Edwards, WireImage

LeAnn Rimes is feeling "much better" after being forced to reschedule her Friday night (Oct. 5) performance in Wendover, Nev., tweeting she was, "under anesthesia" and suffering from "a massive infection." While she didn't specify what the infection was, LeAnn described it by writing, "I feel like I got hit in my right side of my face with a baseball bat."

On Sunday (Oct. 7), the 30-year-old posted on her website about going to the emergency room the night before, "The ER at 3am, THAT is an interesting place to be. Feeling much better now, thanks to my husband's best friend who's an ER doc. I've been living in a dental nightmare for 10 months. I'm getting back on track though, I hope."

Earlier this year, the "Give" singer had to cancel several shows in order to undergo dental surgery, following an emergency root canal. "Needless to say, I'm resting today (Sunday)," she added. "Thank you all for your support and understanding. The last 10 months of pain are hard for me to wrap my head around. I'm sure it's difficult for you all to understand too. Let's just pray I'm on the mend. I'll see you all on the road very soon."

LeAnn is expected to perform in New Wilmington, Pa., on Thursday (Oct. 11). See her tour schedule here.