It could be Appendicitis if it is very severe pain and accompanied by vomiting or nausea or Mesenteric Adenitis if you have symptoms of a cold before.
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This area is known as the epigastrium and is typically the location of the stomach. Pain here could be heart based or it could be something like a peptic ulcer or acid reflux. Either way, get it...
Cause of Shooting Pains.
This is quite possibly from something pinching the nerve in your arm. It could be anything from a repetitive strain injury to a tumor next to the nerve. Try taking it easy...