When is a mosquito bite something to worry about?
Most mosquito bites are puffy, itchy bumps that fade in a few days. Rarely, mosquitoes spread illnesses such as West Nile virus.
Not sure what bit you?
Upload a photo and answer three quick questions for a free assessment.
Check my biteWhat it looks like
- Puffy pale or red bump within minutes
- Itching for one to three days
- Children may swell more
What to do
- Wash, apply a cold pack, and avoid scratching
- Use repellent outdoors
See a doctor if you notice
- Fever, severe headache, or stiff neck days later
- Large blistering reactions
Trouble breathing, face or throat swelling: call 911 now.
Other bite guides
Educational information only, not a diagnosis. BiteID is in alpha testing.