The best way to keep mosquitoes away from your baby combines physical barriers like netting with careful use of repellents that are age-appropriate. What’s safe depends heavily on your baby’s age: children under 2 months should be protected with clothing and netting only, while older infants can use DEET or picaridin-based repellents at child-safe concentrations.
Age Determines Which Repellents Are Safe
For babies younger than 2 months, skip chemical repellents entirely. Their skin is thinner, their surface-area-to-body-weight ratio is higher, and their systems are less equipped to process chemicals. The American Academy of Pediatrics advises parents of newborns and premature infants to be especially cautious when deciding whether to apply DEET or other chemicals to their child’s skin. At this stage, netting and clothing are your only tools.
Once your baby is 2 months or older, you can use repellents containing DEET (up to 30% concentration) or picaridin. Both are effective, and current data shows no evidence that children have increased sensitivity to picaridin compared to adults. A product with 10% to 20% DEET protects for a few hours, which is enough for most outdoor outings. Higher concentrations last longer but don’t repel more effectively.
One important restriction: oil of lemon eucalyptus (sometimes listed as PMD or para-menthane-diol) should not be used on children younger than 3 years old. Despite sounding natural, it hasn’t been tested enough in young children to be considered safe for them.
How to Apply Repellent on a Baby
Apply repellent to your own hands first, then rub it onto your baby’s exposed skin. This gives you control over how much goes on and where it lands. Avoid the hands entirely, since babies constantly put their fingers in their mouths and eyes. Keep it away from any cuts, rashes, or irritated skin.
Don’t apply repellent under clothing. It’s designed for exposed skin only, and trapping it against the body increases absorption without any added benefit. When you come back indoors, wash the treated skin with soap and water. If you’re also using sunscreen, apply the sunscreen first and the repellent second, since sunscreen needs direct skin contact to work.
Netting and Clothing as a First Line of Defense
For newborns and young infants, physical barriers are the most reliable protection. Drape mosquito netting over strollers, car seats, and baby carriers whenever you’re outdoors. Make sure the netting is fine enough that mosquitoes can’t fit through. For reference, mesh on cribs and playpens should be less than one-quarter inch in size, and mosquito netting should be similarly tight or tighter. Check for any tears, holes, or loose threads that could create gaps or pose an entanglement risk.
Lightweight, long-sleeved shirts and long pants in light colors offer solid protection without overheating your baby, especially during early morning and evening hours when mosquitoes are most active. Loose-fitting clothing works better than tight clothing because mosquitoes can bite through fabric that’s pressed against skin. Tuck pants into socks if you’re in a heavily infested area, even if it looks ridiculous.
Permethrin-treated clothing adds another layer. Permethrin is an insecticide that kills mosquitoes on contact with the fabric. The EPA evaluated multiple exposure scenarios for factory-treated clothing, including toddlers wearing and mouthing the fabric, and found risk levels below their threshold of concern for both short-term and long-term exposure. You can buy pre-treated clothing or spray your own (treat it outdoors, let it dry completely before your child wears it, and never apply permethrin directly to skin).
Reducing Mosquitoes Around Your Home
Mosquitoes breed in standing water, and they don’t need much of it. A bottle cap’s worth of water is enough to support larvae. Walking your yard once a week to dump, drain, or cover standing water makes a real difference in how many mosquitoes hatch near your home.
The most commonly overlooked breeding spots include:
- Plant saucers and bird baths: Empty and rinse weekly, or fill saucers with fine aquarium gravel so water can’t pool.
- Gutters: Clean them so water flows freely instead of collecting in debris.
- Old tires: Dispose of them, or drill drainage holes if they’re being used as playground equipment.
- Tarps, sandbox covers, and garbage can lids: Arrange so water runs off rather than pooling in folds and dips.
- Patio umbrella bases and portable basketball stands: Fill with sand instead of water, or make sure plugs are screwed on tight.
- Pet water bowls: Rinse and refill weekly.
- Hollow fence posts: Cap open chain-link or plastic fence posts so they don’t fill with rainwater.
- Dripping outdoor faucets and window AC units: Fix leaks, and place rocks under AC units so water disperses instead of puddling.
Even drainage ditches and low areas in your yard can become breeding grounds if clogged with grass clippings. Keeping water flowing freely is the goal everywhere.
Timing Outdoor Activities Strategically
Mosquitoes are most active at dawn and dusk. If you can schedule outdoor time for midday, your baby will encounter far fewer of them. This isn’t always practical, but it’s worth considering for activities like walks or park visits. On days when you do go out during peak hours, layering strategies (netting on the stroller, long sleeves, repellent on exposed skin) provides the best coverage.
Fans can help in outdoor seating areas. Mosquitoes are weak fliers, and even a moderate breeze from a portable fan makes it harder for them to land. If you’re sitting on a porch or patio with your baby, positioning a fan nearby adds passive protection without any chemicals at all.
What Doesn’t Work
Citronella candles, ultrasonic repellent devices, and wristbands with repellent have consistently shown little to no effectiveness in controlled testing. They may seem appealing because they don’t involve putting anything on your baby’s skin, but they don’t create a reliable zone of protection. Bug zappers actually attract more mosquitoes to your yard than they kill, and mostly destroy insects that aren’t biting pests.
Garlic supplements, vitamin B patches, and similar “natural” deterrents have no scientific support. If you’re looking to minimize chemical exposure, netting, clothing, and permethrin-treated fabrics are far more effective than any of these alternatives.