Black poop can be harmless, caused by certain foods or medications, or it can be a sign of melena, meaning there’s blood in your stool. Melena happens when bleeding occurs in the upper digestive tract ...

Most spider bites cause local pain, redness and swelling. It's much like a bee sting reaction. A few spiders (such as the Black Widow) can cause a more severe reaction. Helpful if spider seen on the ...