The hazards of food poisoning include nausea, vomiting, abdominal pain, diarrhea; it can also cause systemic symptoms, such as fever, dizziness, headache, etc.; in severe cases, dehydration, acidosis, and even life-threatening. 1. After food poisoning, the first manifestation is gastroenteritis symptoms, such as: nausea, vomiting, abdominal pain, diarrhea, etc., stools are mostly yellow loose stools or watery stools, stools more often, dehydration, electrolyte disorders and other symptoms can occur. 2. If the symptoms of vomiting and diarrhea are severe, there will be dehydration, dry skin, oliguria, acidosis, shock and coma in severe cases. 3. Systemic symptoms of poisoning, such as fever, dizziness, headache, etc., may also occur after food poisoning. After the occurrence of food poisoning, it is necessary to replenish fluids and take more rest. If there are chills and fever, etc., you should go to the hospital in time, and carry out standardized treatment under the guidance of the doctor.