Mercury is used in barometers, blood pressure instruments, thermometers, and other pressure-sensing instruments. Batteries containing mercury are used in some small electronic devices. If heated, mercury is a colorless, odorless gas. Illinois Department of Public Health Back to top Health issues associated with mercury exposure Health issues caused by mercury depend on how much of it has entered the body, how it entered, length of exposure and how the body responds to it. Mercury is harmful to both humans and animals.
Children are more susceptible to mercury poisoning than adults.
Exposure to even small amounts of mercury over a long period of time may cause negative health effects including damage to the brain, kidney, lungs and the developing fetus. Brief contact with high levels of mercury can cause immediate health effects including loss of appetite, fatigue, insomnia, and changes in behavior or personality. Depending on the length or degree of exposure, additional symptoms such as nausea, abdominal cramps, diarrhea, eye irritation, weight loss, skin rashes, and muscle tremors may occur. Once mercury has entered the body, it can take months before it is eliminated, mainly through the urine and feces. Levels of mercury can be measured in blood, urine and scalp hair.