Veteran singer Cher was left in tears after undergoing a four-hour operation for a tooth infection.

The Believe hitmaker visited a dentist on Thursday (04Oct12) for treatment to an infected molar, but told fans being given a general anaesthetic had left her shaken up.

In a post on Twitter.com, she wrote, "Love u (you), but don't feel well... have 2 (to) get oral surgery... have bad infection in molar", later adding, "Today was Rough! Put 2 (to) sleep & then spent 4 hrs in the Chair. I Cried, Dont Like that feeling!"