1 Angina Pectoris: It is described as a pain located at the back of the breast bone which may be sharp or dull. This sensation may radiate or crawl to the hand, arm, left shoulder, or jaw.  Vasculitis: When the small to medium sized arteries are inflamed, head tingling and numbness may result.
Most species of shark eat things like fish, crustaceans, mollusks, plankton, krill, marine mammals and other sharks. Sharks also have a very acute sense of smell that allows them to detect blood in the water from miles away.
Research shows that sharks are capable of responding to one part blood for every 10 billion parts water, essentially a tea spoon of blood in a swimming pool; but, not probably not an Olympic sized swimming pool. Sharks can smell 10,000x better than humans. But, according to LiveScience (Shark Smell Myth Found Fishy ) and Floridian researchers, the smelling capacity of sharks based on the volume of blood and/or amino acids in a volume of water does not greatly exceed that of other fish species.