Scombroid Poisoning (Fish Poisoning): Scombroid poisoning is poisoning due to the ingestion of contaminated fish. Bacteria have grown during the improper storage of the dark meat of the fish and these bacteria produce scombroid toxin. Scombroid poisoning symptoms include nausea, vomiting, abdominal cramps, diarrhea, headache, itching, hives, palpitations, and fever. Treatment of scombroid poisoning depend on the patient's symptoms, amount of contaminated fish ingested, and time of ingestion.