It is recommended not to eat salmon raw at ordinary times, otherwise it will be infected with parasites and endanger your health. Before salmon is eaten raw, it is best to freeze it. Low temperature freezing can kill parasites. Generally, salmon can be frozen at MINUS 30 degrees for about 24 hours to kill parasites. Eating salmon raw can cause bacterial infection, cholangitis and bile duct hepatitis, which is mainly characterized by loss of appetite, diarrhea, epigastric discomfort, hepatomegaly and eosinophilia.