What Bit Me? A Practical Identifier Calculator for the Most Likely Culprit

This is a fast, practical guide designed to help you understand what might have bitten or irritated you. By selecting the symptoms, the circumstances, and basic insect biology, this tool narrows down the possibilities and rules out most common biting insects and arachnids. It gives you a clearer direction on whether you might be dealing with bed bugs, fleas, mites, mosquitoes, spiders, biting flies, or other creatures. While it cannot replace a medical diagnosis, it helps you understand the likely category and avoid guesswork.

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Use the “What Bit Me?” selector to compare your symptoms with the typical behaviour, habitat and bite patterns of different pests. Choose whether the insect flies, jumps or crawls, whether the bites appeared at night or during the day, and where exactly they showed up on your skin. Combine these clues with the biology of each pest, and you can quickly eliminate most suspects and focus on the few that realistically match your situation.

If your symptoms are severe, spreading, painful, or accompanied by fever, always contact a qualified medical professional—preferably a dermatologist. Even the best identification tools cannot replace a proper clinical evaluation. This guide is meant to support your understanding, not to diagnose or treat medical issues.