Mercury poisoning . Symptoms of mercury poisoning can vary greatly and mimic many acute diseases. Cardiovascular symptoms have been reported with acute poisoning. The most common symptoms are neurological: tingling or loss of sensation in the extremities, mental disorientation, ringing in the ears, tremors, etc.
Too much. Sorry too much to put in this limited space wikipedia has good information also google for video on mercury toxicity from university of calgary. Excellent visual demonstartion of neuron degeneration and explanation of it. Very toxic heavy metal and hard to get rid of; requires a combination of oral and IV chelation therapy to get it out effectively.