The “pincher bug” is the common name for the earwig, an insect belonging to the order Dermaptera. They are easily recognized by the prominent pair of forceps-like appendages, called cerci, extending from the rear of their abdomen. Despite their intimidating appearance, earwigs are not aggressive and do not seek out humans. The injury commonly referred to as a “bite” is a purely defensive pinch delivered using these cerci when the insect feels threatened or is handled carelessly.
The Appearance of the Mark
The visual characteristics of an earwig’s defensive action are distinct from a typical insect bite, as the injury is caused by mechanical compression, not venom. The mark is usually superficial, often presenting as a minor scrape or light abrasion on the skin’s surface. The insect’s cerci are generally too weak to break human skin, though the pinch can be momentarily painful.
If the pinch is delivered with more force, especially by a larger male earwig, the mark may appear as two small, closely spaced red puncture points. These twin marks correspond directly to the tips of the two cerci. The mark is not a raised welt or a defined bullseye pattern like those caused by other insects, and it often fades quickly. Breaking the skin is rare, resulting only in a pinpoint spot of bleeding or a tiny scab.
Accompanying Symptoms and Reactions
The immediate sensation of an earwig pinch is a sharp, quick pain, similar to a sudden snap on the skin. This initial discomfort is short-lived, as the insect does not inject venom or harmful substances. Following the pinch, the area may exhibit mild, localized redness (erythema) and slight swelling.
This reaction is a common, mild inflammatory response to the physical trauma. Because earwigs inhabit damp areas, soil, and decaying matter, there is a minor risk of secondary infection if the skin is broken and not cleaned properly. Severe reactions, such as widespread rash or difficulty breathing, are extremely rare, as earwigs do not transmit disease-causing pathogens.
Immediate First Aid
If pinched by an earwig, the most important step is to clean the affected area immediately and thoroughly. Use mild soap and warm water to wash the site, which removes potential bacteria and minimizes the risk of infection. If the skin was broken, apply an over-the-counter antiseptic or antibacterial cream to the small wound.
To address any mild localized swelling or tenderness, apply a cold compress or an ice pack wrapped in a cloth. The discomfort should resolve quickly without further intervention. Monitor the area for signs of a developing infection, such as increasing redness, warmth, discharge, or pain that persists for more than a couple of days, which warrants seeking medical attention.