Raw kelp can cause food poisoning, and there are several reasons for poisoning caused by raw kelp. 1. Bacterial food poisoning caused by bacterial infection of kelp when eating raw kelp, patients will have high fever, convulsions, nausea, vomiting, abdominal pain, diarrhea, shock and other symptoms. 2. This is a serious situation and should be promptly treated at a hospital. 2. The cause of poisoning after eating raw kelp may also be caused by the toxic ingredients contained in the kelp, such as the arsenic element that is toxic to humans inside the kelp. If not fully cleaned and cooked, arsenic will remain in large quantities in the kelp. When people consume it, it can lead to arsenic poisoning, and they should go to the hospital for symptomatic treatment in time.