<Tr> <Th> Symptoms </Th> <Td> Sharp, stabbing chest pain in a small area </Td> </Tr> <Tr> <Th> Usual onset </Th> <Td> Sudden </Td> </Tr> <Tr> <Th> Duration </Th> <Td> Less than 3 minutes </Td> </Tr> <Tr> <Th> Causes </Th> <Td> Unclear </Td> </Tr>

Feels like a bubble in the middle of my chest