Chrissy Teigen is an open book. The model, author and television personality is bold, brazen and doesn’t hold much back. But a recent tweet has fans worried. On Tuesday, Teigen admitted she has been dealing with facial tingling and numbness, both of which are symptoms of Bell’s palsy. So what is BP? According to the Mayo Clinic, the condition causes sudden weakness in your facial muscles, and this weakness often results in droopy eyelids and/or a one-sided smile.