Facebook eventually filed for an initial public offering on February 1, 2012. Facebook held an initial public offering on May 17, 2012, negotiating a share price of US$38. The company was valued at $104 billion, the largest valuation to date for a newly listed public company.
No one knows what causes these small, painful blisters inside your mouth. Triggers include hypersensitivity, infection, hormones, stress, and not getting enough of some vitamins. Also called aphthous ulcers, canker sores can show up on the tongue, cheek, even your gums.
My husband gets painful canker sores all the time in his mouth. What's the deal? Thanks, Brittany. Canker sores are small ulcers that develop in the soft tissues of the mouth. They can appear under the tongue, inside the cheeks or lips and at the base of the gums. Doctors donât know exactly what causes canker sores, but they do know there are a number of contributing factors. 1  These include: 2  Having a weakened immune system. 3  Poor nutrition or vitamin deficiencies. 4  Minor injuries to the mouth. 5  Hormones. 6  Even using some toothpastes or mouth washes that contain sodium lauryl sulfate.