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Ankle biter bitesWhat they look like and what helps

Mosquito bites: what's normal and what helps

General information from the sources cited, not medical advice. Ask a healthcare professional about symptoms.

Get help now if

Call 911Trouble breathing, throat or lip swelling, fainting
Medical help nowBaby under 3 months with a fever
Care right awayFever with stiff neck, confusion or weakness; severe belly pain, vomiting or bleeding

Source: Mayo Clinic: anaphylaxis first aid · Mayo Clinic: fever first aid · CDC: West Nile symptoms · CDC: dengue symptoms

How ankle biter bites show up

Illustration: a lower leg with several red mosquito bites around the ankle and calf, a black-and-white striped mosquito flying nearby, and a sun for daytime
  • Daytime
  • Ankles and lower legs
  • Often several at once

Puffy bump first, then a firm, itchy one. Small blisters or dark spots can happen too.

Source: SGV district: Aedes mosquitoes · SGV district: mosquito guide, page 3 · CDC: mosquito bites

Is my bite normal?

Typical

  • Puffy, reddish bump within minutes
  • Hard, itchy bump a day or so later

Home care below

Big reaction

  • Large, swollen, sore area
  • "Skeeter syndrome," more common in kids
  • Can look like infection

Cool cloth; call a clinician if it keeps growing

Get it checked

  • Redness spreading or a red streak
  • Pus or yellow crust
  • More pain or warmth
  • Fever, or a rash spreading fast

See a healthcare professional

On darker skin, redness can look purple or brown.

Source: CDC: mosquito bites · Mayo Clinic: symptoms and causes · Mayo Clinic: bite care · AAD: rash and infection warning signs

What helps the itch

WashSoap and water
Cool clothEases itch and swelling
Don't scratchBroken skin can get infected
Anti-itch creamFollow the label; ask a pharmacist about antihistamines

Babies: ask their clinician before using any treatment.

Source: CDC: mosquito bites · Mayo Clinic: bite care

Fever after bites?

Dengue and West Nile can cause fever, headache, body aches or a rash. See a clinician and mention the bites and any travel. LA dengue and West Nile

Source: CDC: dengue symptoms · CDC: West Nile symptoms

Stop the next bite

RepellentEPA-registered: DEET, picaridin or IR3535. Follow the label; not on kids' hands.
Cover upLong sleeves and pants; netting over strollers
Dump water weeklySaucers, buckets, tires. Yard checklist

Source: EPA: registered repellent ingredients · CDC: preventing mosquito bites

Not sure it was a mosquito? Take the three-question quiz.

All sources (reviewed October 3, 2026)

Sources