Itchy Insect Bites: Bites of mosquitoes, chiggers (harvest mites), fleas, and bedbugs usually cause itchy, red bumps.
Painful Insect Bites: Bites of horseflies, deer flies, gnats, fire ants, harvester ants, blister beetles, and centipedes usually cause a painful, red bump. Within a few hours, fire ant bites can change to blisters or pimples.
This topic excludes bees, ticks and spiders.
A severe life-threatening allergic reaction is called anaphylaxis
See More Appropriate Topic (instead of this one) If
BEE OR YELLOW JACKET STING
SPIDER BITE
TICK BITE
(To go directly to these topics, click on the links following this document.)
WHEN TO CALL YOUR DOCTOR FOR INSECT BITES
Call 911 Now (your child may need an ambulance)(for symptoms of anaphylaxis) If
Difficulty breathing or wheezing
Hoarseness or cough with rapid onset
Difficulty swallowing or slurred speech with rapid onset
Previous severe allergic reaction to same insect bite
NOTE: Anaphylaxis can occur with bee, yellow jacket, wasp, or fire ant stings (rarely with other insects). Onset usually is within 20 minutes.
First Aid Advice for Anaphylaxis
Give epinephrine injection if you have an anaphylactic kit.
Inject it into the muscle of the upper outer thigh.
Call Your Doctor Now (night or day) If
Your child looks or acts very sick
Hives or swelling elsewhere on the body
More than 20 fire ant stings in a child < 1 year old
Call Your Doctor Within 24 Hours (between 9am and 4pm) If
You think your child needs to be seen
Severe pain is not improved after 2 hours of pain medicine
New redness or red streak occurs around the bite after the first 24 hours
Scab that looks infected (drains pus or increases in size) not improved after applying antibiotic ointment for 2 days
Call Your Doctor During Weekday Office Hours If
You have other questions or concerns
Parent Care at Home If
Normal insect bite and you don't think your child needs to be seen
HOME CARE ADVICE FOR INSECT BITES
1. Itchy Insect Bites (including all mosquito bites):
Apply calamine lotion or a baking soda paste.
If the itch is severe, use 1% hydrocortisone cream (no prescription). Apply 4 times a day until the itch is less severe, then switch to calamine lotion.
Also apply firm, sharp, direct, steady pressure to the bite for 10 seconds. A fingernail, pen cap, or other object can be used.
If the bite is very itchy after local treatment, try an oral antihistamine (e.g. Benadryl). Sometimes it helps, especially in allergic children.
2. Painful Insect Bites:
Rub the bite for 15 to 20 minutes with a cotton ball soaked in a meat tenderizer solution. This will usually relieve the pain. (Caution: don't use near the eye)
If not available, use a baking soda solution on a cotton ball.
If neither is available, apply an ice cube for 20 minutes.
Give acetaminophen (e.g. Tylenol) or ibuprofen for pain relief. See Dosage table. Antihistamines don't help.
3. Antibiotic Ointment: If the insect bite has a scab on it and the scab looks infected, apply an antibiotic ointment 4 times per day.
Cover the scab with a Band-Aid to prevent scratching and spread.
Repeat washing the sore, the antibiotic ointment and the Band-Aid 4 times per day until healed.
Caution: For spreading infections (redness or red streaks), your child needs to be seen.
4. Expected Course: Most insect bites itch or hurt for 1 to 2 days. The swelling may last a week.
5. Call Your Doctor If
Severe pain persists > 2 hours after pain medicine
Infected scab doesn't clear after 48 hours of antibiotic ointment.
Bite looks infected (redness, red streaks, increased tenderness)
Your child becomes worse or develops any of the "Call Your Doctor" symptoms.
Lucile Packard Children's Hospital is located in Palo Alto, adjacent to Stanford University Hospital, approximately 20 miles north of San Jose, CA and 40 miles south of San Francisco.