Mercury toxicity is commonly associated with vapour inhalation or oral ingestion, for which there exist definite treatment options.Intravenous mercury injection is rarely seen, with few documented cases. Treatment strategies are not clearly defined for such cases,although a few options do show benefit. This case report describes a 29-year-old man suffering from bipolar disorder, who presentedfollowing self-inflicted intravenous injection of mercury. Clinical and radiographic features, possible adverse clinical sequelae in preexistingmental illness and further complications are discussed, as well as possible treatment strategies in light of relevant literature.