An illness associated with the consumption of spoiled samples of some species of fish, particularly, but not exclusively, of scombroid fish, hence the name. World-wide, it is considered to be one of the most common causes of seafood poisoning. It is usually a mild illness with rapid onset of a variety of relatively non-specific symptoms - rashes on the face, nausea, vomiting and/or diarrhoea, headache, palpitations - though a particular patient might not show all these symptoms. Sometimes symptoms are confused with those of a Salmonella infection or food allergy. Fish and products that have been implicated in such food poisoning incidents have often, but not always, been associated with high concentrations of histamine. Because of this, and the similarity between the symptoms of scombrotoxicosis and those of histamine poisoning, the illness is, or was, often referred to as 'histamine poisoning' or histamine fish poisoning'.