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.
Other Conditions May Cause It. Dry mouth can be caused by a medical condition called SjÃ¶gren's syndrome. It's an autoimmune disorder in which white blood cells attack the body's tear and salivary glands. People with diabetes or HIV can also get dry mouth.