Kid-safe mosquito repellents

The list, which is short

The CDC lists these as registered repellent actives: DEET, picaridin, IR3535, oil of lemon eucalyptus (OLE), para-menthane-diol (PMD), and 2-undecanone. It notes that DEET and picaridin protect for the longest.

If an active is not on that list, there is no good evidence it works. That covers wristbands, ultrasonic devices, vitamin B1, and most homemade essential oil sprays.

This page follows the CDC and EPA guidance. It is not medical advice, and your pediatrician's advice about your child outranks it.

By age

Under 2 months. No repellent. Use mosquito netting over a stroller or carrier — it is completely effective and has no exposure at all. Long sleeves and light clothing do the rest.

2 months and older. DEET and picaridin are both considered appropriate by US pediatric guidance when used as directed. Lower concentrations do not work less well; they work for a shorter time, which is the right lever for a child.

Under 3 years. Oil of lemon eucalyptus and PMD are not for children under three. This is stated on the product label. It is the most commonly missed restriction in the category, precisely because OLE is the option parents reach for when they want something plant-based.

3 and over. Any of the listed actives, applied per label.

Which one, practically

Picaridin, 20% is our usual recommendation for families. It protects for a long period, it is odorless enough that children keep it on, and — the underrated part — it does not damage plastics, synthetic fabric, sunglasses or watch straps, which DEET does.

DEET at a lower concentration is well-studied, inexpensive and effective. Concentration governs duration rather than strength: roughly, 10% for a couple of hours, 20-30% for longer. There is no reason to use a high concentration on a child.

IR3535 is a gentler option with a shorter protection period, commonly found in family-marketed products.

OLE/PMD is the botanical with genuine standing, with the under-three restriction above.

Applying it to a child

• Adult applies it. Never hand the bottle to a child.
• Spray your own hands first, then rub it onto the child's skin. Never spray toward a face.
• Avoid hands — they go in mouths and eyes — and avoid the area around the eyes and mouth entirely.
• Not on cuts or irritated skin.
• Not under clothing. Repellent works on exposed skin; under fabric it just increases absorption.
• Do not use a combined sunscreen-and-repellent product. Sunscreen needs frequent reapplication and repellent does not, so a combined product over-applies one of them. Sunscreen first, let it absorb, then repellent.
• Wash it off when you come indoors, with soap and water.
• Reapply only per the label, not whenever you think of it.

The options with no exposure at all

Often the better answer for small children:

• Netting. Over a stroller, a crib or a play area. Completely effective, zero exposure, and the correct answer under two months.
• Clothing. Long sleeves, long pants, light colors, loose weave. Permethrin-treated clothing is an option for older children — applied to fabric, never to skin, and per the label.
• Timing. The common backyard biters peak at dawn and dusk; moving outdoor play to the middle of the day avoids much of it.
• A fan on a patio or a deck. Mosquitoes are weak fliers and moving air measurably reduces landings.
• A repellent zone for a seating area, which treats the air rather than the child. Outdoors and ventilated only, per label.
• Removing standing water, so there are fewer mosquitoes to begin with. The yard guide.

What to skip

Repellent wristbands and clip-on devices. A repellent creates a treated envelope around the skin it is applied to. A band cannot do that for a whole child.

Ultrasonic repellers, wearable or otherwise. No supporting evidence.

Homemade essential oil sprays. They evaporate within minutes. Registered products are formulated to persist for hours, and that persistence is most of what you are buying.

Citronella candles as protection for children. A small effect within a very small radius in still air. Not a defense.

Bites, when they happen

Wash with soap and water, apply something cold, and try to prevent scratching, since broken skin is what turns an itchy bite into an infected one. An over-the-counter antihistamine or hydrocortisone cream may help — ask your pharmacist or pediatrician for a child.

Seek medical advice for a very large local reaction, signs of infection, or any systemic symptoms. Mosquito-borne illness is uncommon in most of the US but not zero, and a fever after significant exposure is worth a phone call.