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Genetic and Rare Diseases Information Center (GARD)

Mercury poisoning

Other Names for this Disease
  • Mercury toxicity
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Mercury poisoning is a condition that occurs in people who are exposed to toxic levels of the element, mercury. There are three different forms of mercury that can cause health problems:
  • Elemental mercury (also known as liquid mercury or quicksilver) can be found in glass thermometers, electrical switches, dental fillings and fluorescent light bulbs. This form of mercury is generally only harmful when small droplets become airborne and are inhaled. If this occurs, signs and symptoms of poisoning may include metallic taste, vomiting, difficulty breathing, coughing, and/or swollen, bleeding gums. In severe cases, long-term brain damage, permanent lung damage and even death may occur.
  • Inorganic mercury is found in batteries, chemistry labs, and some disinfectants. This form of mercury is harmful when swallowed. Signs and symptoms of inorganic mercury poisoning vary based on the amount consumed, but may include burning in the stomach and throat; vomiting; and/or bloody diarrhea. Inorganic mercury can also affect the kidneys and brain if it enters the blood stream.
  • Organic mercury can be found in fish. Some organisms convert fumes from burning coal into organic mercury. This form of mercury is harmful if inhaled, eaten, or placed on the skin for long periods of time. Long-term exposure to organic mercury may result in skin numbness or pain; tremor; inability to walk well; blindness; double vision; memory problems; seizures; or even death.
Treatment is generally supportive and based on the signs and symptoms present in each person. Medications called chelators, which remove mercury and heavy metals from the body, are generally prescribed.[1][2][3]
Last updated: 2/5/2016


  1. David A Olson, MD. Mercury Toxicity. Medscape Reference. October 2015;
  2. Mercury. MedlinePlus. January 2014;
  3. ToxFAQsTM for Mercury. Agency for Toxic Substances and Disease Registry. March 2015;
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Basic Information

  • The Agency for Toxic Substances & Disease Registry is a federal public health agency of the U.S. Department of Health and Human Services that provides trusted health information to prevent harmful exposures and diseases related to toxic substances. Please click on the link to access their information page on Mercury poisoning.
  • MedlinePlus was designed by the National Library of Medicine to help you research your health questions, and it provides more information about this topic.

In Depth Information

  • Medscape Reference provides information on this topic. You may need to register to view the medical textbook, but registration is free.
  • The Monarch Initiative brings together data about this condition from humans and other species to help physicians and biomedical researchers. Monarch’s tools are designed to make it easier to compare the signs and symptoms (phenotypes) of different diseases and discover common features. This initiative is a collaboration between several academic institutions across the world and is funded by the National Institutes of Health. Visit the website to explore the biology of this condition.
  • PubMed is a searchable database of medical literature and lists journal articles that discuss Mercury poisoning. Click on the link to view a sample search on this topic.
Other Names for this Disease
  • Mercury toxicity
See Disclaimer regarding information on this site. Some links on this page may take you to organizations outside of the National Institutes of Health.