The actress got burnt when the hair curler slipped from the arms of her hairstylist. The hot tongs burnt her cheek and arms.

Bipasha tweeted, "Started my day of shoot with multiple burns on my face and hands by a hairstylist. She dropped the tong on me and did not even flinch."
However, the actress soon deleted the tweet and the pictures from her account. Reportedly, she asked for a replacement and this time she was much more careful. She posted a photo on Instagram where she is holding a mirror against her face to protect herself as a different hair designer is attending to her.
Source-Medindia