3. Blood Disorders. Blood disorders such as hemophilia and leukemia can cause unexplained bruising, often because your blood fails to clot properly. If you have severe and frequent unexplained bruising, it's a good idea to see a physician to rule out such disorders, especially if it seemed to come on suddenly.
Puffer fish contain the potent neurotoxin tetrodotoxin. TTX is thought to be synthesized by a bacterial or dinoflagellate species associated with the puffer fish. The toxin is concentrated in the liver, gonads, and skin. The level of toxicity is seasonal, and, in Japan, fugu is served only from October through March.
Tetrodotoxin poisoning has been described as rapid and violent, first a numbness around the mouth, then paralysis, finally death. The unfortunate diner remains conscious to the end. There is no antidote. This would be enough to kill you, Miura-san says, slicing off a tiny sliver of fugu ovary and holding it up.