The clinical manifestations of lithium toxicity are as follows: 1. damage to the nervous and muscular systems can occur, with ataxia, muscle weakness, muscle tremors, as well as speech disorders and blurred consciousness. 2. lithium toxicity can cause gastrointestinal reactions, with symptoms such as nausea, vomiting, fatigue, poor appetite, abdominal pain and diarrhea. 3. it can cause damage to the central nervous system, with severe patients experiencing headaches and dizziness. In severe cases, lithium poisoning can lead to multi-organ toxicity and life-threatening organ failure. After lithium poisoning, you should stop taking lithium in the first place. For example, lithium poisoning is commonly caused by overdose of lithium carbonate drugs, so you should stop taking lithium carbonate. You should also try to induce vomiting, diarrhea and other treatments as much as possible, if necessary, you can also gastric lavage and a lot of saline input, a lot of sodium chloride can effectively lift the phenomenon of lithium carbonate poisoning, if the poisoning is more serious should be detoxification treatment through hemodialysis and other methods.