Uh-oh. You’ve been bitten. But by what? You know it itches. You know it’s red and swollen. You know it’s annoying. But what caused that welt on your arm?
Many bites and stings are uncomfortable, annoying and sometimes painful. In fewer cases they can be dangerous. All cases have a standard reaction. There is inflammation, redness and maybe swelling. It’s very hard to tell what bit you unless you see it happen. In general, bites will itch while stings will hurt.
Different critters will leave different marks on your skin. Here’s a handy guide to help you determine what got you — as well as when it’s just a minor irritation or a potentially big problem (Ack! Bed bugs!).