Most food poisoning occurs within five to ten hours after eating. Symptoms of acute gastroenteritis usually appear. The patient has nausea, vomiting, diarrhea, abdominal pain, and sometimes there may be pus in the stool. If vomiting and diarrhea are particularly severe, the body will lose too much water, which may lead to shock. Some patients also have symptoms such as chills, fever, sweating, salivation and convulsions.

Sometimes poisoning is caused by eating spoiled canned food, bacon and sausages. This is because cured meat is contaminated with a botulinum toxin, which may produce a lot of toxins and cause very serious neurological symptoms after eating.

Patients will spontaneously feel tired, tired, headache, dizziness, unable to see clearly, unable to open their eyes, dilated pupils, difficulty swallowing or speaking, paralysis of hands and feet and other symptoms. Vomiting, diarrhea and stomachache sometimes occur, which may lead to death within a few days if not treated quickly. Therefore, everyone should pay special attention when eating at ordinary times.