Erethism

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Erethism

Torstein
Erethism or erethism mercurialis is a neurological disorder which affects the whole central nervous system, as well as a symptom complex derived from mercury poisoning. This is also sometimes known as the mad hatter disease.

It is commonly characterized through behavioral changes such as irritability, low self-confidence, depression, apathy, shyness[3][4] and timidity, and in some extreme cases with prolonged exposure to mercury vapors, delirium, personality changes and memory loss occur as a result.

People with erethism find it difficult to interact socially with others, with behaviors similar to that of a social phobia. Although most of the effects of erethism are neurological, some physical problems arise as well, including a decrease in physical strength, “headaches, general pain, and tremors after exposure to metallic mercury”[5] as well as irregular heartbeat. It has been documented that “the tremor in the hands can be so severe that the victim is unable to hold a glass of water without spilling its contents.”

The primary risk factor for erethism is long-term exposure to mercury vapors

https://en.wikipedia.org/wiki/Erethism#Symptoms