Hi my friend has a severe blinding tooth ache. He says that when his braces where removed at the age of 15, a whole was left from the removal process that was never repaired. As the years went by his tooth decayed but he felt no discomfort. Now at the age of 32 half the tooth has fallen out and the root of the tooth is completely black. Just a week ago he start to get sharp pain shooting through his mouth originating from said tooth. All over the counter medications that used to help with the pain no longer help. And the pain is now blinding accompanied with severe headaches, fever and the inability to sleep due to pain. What should he do? And is there a possibility of the infection from the rotten tooth getting into his blood system and or compromising his over all health due to infection?