Eating puffer fish can cause a variety of health issues, including food poisoning, paralysis, and even death. Puffer fish contain a neurotoxin called tetrodotoxin, which can cause serious neurological symptoms if consumed. Eating puffer fish can also cause symptoms such as nausea, vomiting, and abdominal pain. It is important to note that the amount of toxin in puffer fish can vary greatly, so it is best to avoid eating them altogether.