Diagnosis is based on a person's symptoms together with having recently eaten<unk> . If a number of those who eat the same<unk>  have symptoms the diagnosis becomes more likely. If some of the<unk>  they had previously eaten is available this can also be tested to confirm the diagnosis. Other potential causes such as paralytic shellfish poisoning (PSP), neurotoxic shellfish poisoning (NSP), scombrotoxin<unk>  poisoning, and pufferfish poisoning should be excluded. The reversal of hot and cold sensations is an occasional symptom of CFP that may help differentiate it from intestinal "flu".
Ciguatera fish poisoning
Scombroid food poisoning
Shellfish poisoning
Tin poisoning
Sulfuric acid poisoning
Chinese alchemical elixir poisoning
Strychnine poisoning
Ethylene glycol poisoning