The Complete Guide to Mosquito Bites

Small raised pink or red bumps, often with a central puncture point. Surrounding wheal may swell within minutes. Highly itchy for many people.

Bites usually appear on exposed skin after outdoor activity — ankles, arms, face, and hands are common.

Minutes to hours: bump forms, itch intensifies.

24–48 hours: peak itch and swelling for many.

3–5 days: most uncomplicated bites fade without treatment.

Large local reactions can last longer in highly sensitized individuals — not always allergy.

Cool compresses, gentle cleansing, and oral antihistamines per label directions. Short-term 1% hydrocortisone on small areas may help.

Discourage scratching to prevent infection and scarring.

Difficulty breathing, facial swelling, or widespread hives suggest systemic allergy — emergency care.

Fever after travel to malaria or dengue-endemic regions requires medical evaluation per travel-health guidance.

Spreading redness, pus, or fever localized to the bite may indicate infection.

EPA-registered repellents (DEET, picaridin, IR3535, oil of lemon eucalyptus per label).

Screens, long sleeves at dawn/dusk, and eliminating standing water near home when feasible.

See related links for mosquito bite guides by body area — face, neck, ankle, and more — when location-specific context matters.