If you have been poisoned by eating crayfish, first try to expel the poison from your body. If you have eaten it for a long time, you can take mannitol orally to promote diarrhea, and try to expel the residual poison. If you have not eaten for a long time, you can induce vomiting or gastric lavage to expel the food from the stomach and intestines as much as possible to reduce the impact of toxicity on the body. If vomiting or diarrhea occurs, anti-vomiting and anti-diarrheal treatment can be given. If the abdominal pain is severe, antispasmodic and analgesic treatment can be given with scopolamine or scopolamine, which can have antispasmodic and analgesic effects. If the poisoning is deeper and affects the central nervous system, symptoms such as coma and convulsions should be given immediately.