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.
Dioxin Contamination of Food. Dioxin is a generic name used to describe a family of compounds known as chlorinated dibenzo-p-dioxins. The most notable, most studied, and most toxic chemical in this family is 2,3,7,8-tetrachlorodibenzo-p-dioxin, or 2,3,7,8-TCDD, most commonly referred to as TCDD. TCDD is colorless and odorless (1).