Insect Bites and Allergic Reactions

A local bite reaction usually stays near the bite and may cause an itchy, red, raised area. An allergic response can involve skin away from the bite, with hives, facial swelling, flushing, or intense itch. Nausea, dizziness, chest tightness, hoarse voice, tongue swelling, or faintness are more concerning than a single itchy bump.

The severity of one reaction does not reliably predict the next. Record the insect if it can be done safely, the time symptoms started, and every symptom that followed. This helps a clinician decide whether further allergy planning is needed.

Leave the area, remove any visible stinger by gently scraping rather than squeezing, and wash the skin. A cool compress can reduce local heat and itch. A pharmacist may recommend [Antihistamine Treatment](/treatments/medical-dermatology/oral-antihistamine-therapy/) for suitable people; use it exactly as directed and do not combine products without checking.

Do not apply a strong cream to broken skin or near the eyes without advice. For a persistent, very itchy local rash, a clinician may discuss [Topical Corticosteroids](/treatments/medical-dermatology/topical-corticosteroids/). Dark marks can remain after inflammation; this is called [Post-Inflammatory Hyperpigmentation](/conditions/post-inflammatory-hyperpigmentation/).

Call emergency services for difficulty breathing, throat or tongue swelling, wheezing, widespread rapidly spreading hives with weakness, repeated vomiting, confusion, or faintness. If you have been prescribed an emergency adrenaline device, use it according to your action plan and call emergency services. Symptoms can worsen after starting mildly.

Ask whether the pattern suggests an allergic reaction, what to do at the first warning sign, and whether you need an emergency action plan. Ask which antihistamine is appropriate for you and how to prevent another exposure.