Preventing bug bites comes down to three things: keeping insects off your skin, making your environment less attractive to them, and knowing which strategies actually work. The right combination of repellents, clothing, and habitat control can eliminate the vast majority of bites from mosquitoes, ticks, and other pests.
Choosing the Right Repellent
The EPA registers five active ingredients for skin-applied insect repellents: DEET, picaridin, IR3535, oil of lemon eucalyptus (OLE), and its synthetic version, PMD. All five work, but they differ in how long they last and how widely available they are. DEET is by far the most common, appearing in over 500 products. Picaridin shows up in about 40 products and has a lighter feel on skin without the greasy residue DEET is known for.
Higher concentrations of DEET last longer, but anything above 50% doesn’t add extra protection. A 30% DEET product will cover you for several hours outdoors, which is enough for most activities. Oil of lemon eucalyptus provides protection comparable to 15% to 20% DEET, making it a reasonable plant-derived option for moderate exposure. It should not be used on children under three years old.
If you’re also wearing sunscreen, apply sunscreen first and repellent second. Reversing the order reduces the effectiveness of both products. Reapply repellent as directed on the label, especially after swimming or heavy sweating.
Repellent Safety for Kids
DEET is safe for adults, children, and infants older than two months. Children under 10 should not apply repellent themselves. An adult should spray it onto their own hands first, then rub it onto the child’s exposed skin, avoiding the hands, eyes, and mouth. There’s no need to buy a special “kids’ formula” as long as you follow these guidelines and stick to concentrations under 30%.
What Clothing Can Do
Long sleeves and pants create a physical barrier, but the real upgrade is permethrin-treated clothing. In a study from UNC’s Gillings School of Global Public Health, outdoor workers wearing permethrin-treated uniforms had 80% fewer tick bites than those in untreated clothing during the first season. The treated clothing also significantly reduced chigger bites and cut down on mosquito bites. Protection declined somewhat in the second year but remained meaningful.
You can buy pre-treated clothing or spray your own gear with permethrin. Treat shirts, pants, socks, and shoes, then let them dry completely before wearing. Permethrin bonds to fabric and survives multiple washes, but it should never be applied directly to skin.
Eliminating Mosquito Breeding Sites
Mosquitoes lay eggs in standing water, and they don’t need much. A space as small as a bottle cap can serve as a breeding ground. Walking your property once a week to dump, drain, or cover water sources is one of the most effective things you can do to reduce mosquito populations near your home.
Here’s where water hides:
- Plant saucers: dump and scrub every three to four days
- Bird baths: change the water at least once a week
- Pet dishes: rinse twice a week
- Gutters: clean in spring and fall, keep free of debris
- Old tires: remove from the property entirely
- Wheelbarrows, buckets, and boats: flip upside down when not in use
- Pool covers and tarps: drain any water that collects on top
- Trash cans: keep lids on and drill drainage holes in the bottom
- Air conditioner drip lines: make sure runoff drains and doesn’t pool beneath the unit
For ornamental ponds or large containers you can’t empty, stock them with fish or treat them with Bti (sold as Mosquito Dunks), a bacteria that kills mosquito larvae without harming pets, fish, or people. Swimming pools should be chlorinated and filtered. If a pool sits unused, drain it or treat it with Bti.
Tick Prevention Beyond Repellent
Ticks don’t fly or jump. They wait on grass and leaf litter, then grab onto you as you brush past. Staying on cleared trails and avoiding tall vegetation cuts your exposure significantly. When you do walk through tick habitat, tuck pants into socks. It looks ridiculous and works well.
The critical step most people skip is the post-outing check. Showering within two hours of coming indoors has been shown to reduce the risk of Lyme disease, partly because unattached ticks wash off easily. After your shower, do a full-body tick check, paying close attention to these spots where ticks tend to hide:
- Under the arms
- In and around the ears
- Inside the belly button
- Back of the knees
- In and around the hair
- Between the legs
- Around the waist
Check children and pets too. Toss your clothes in the dryer on high heat for 10 minutes to kill any ticks clinging to fabric. This works even if the clothes are dry.
Avoiding Bed Bugs While Traveling
Bed bugs aren’t prevented with repellent. They’re prevented with inspection. When you check into a hotel room, inspect the mattress seams and headboard before unpacking. Look for small rust-colored spots, shed skins, or the bugs themselves, which are flat, oval, and about the size of an apple seed.
Use the luggage rack to hold your bags rather than setting them on the bed or floor. Keep suitcases away from the bed and never store them underneath it. If you spot signs of bed bugs, request a different room, ideally not adjacent to the original one.
Timing Matters for Mosquitoes
Different mosquito species bite at different times. The Aedes mosquitoes that carry Zika, dengue, and chikungunya are daytime biters, with peak activity in the early morning and late afternoon. If you’re in a region where these diseases circulate, repellent and protective clothing matter during the day, not just at dusk. Young children and pregnant women should sleep under mosquito nets if resting during daytime hours.
The mosquitoes that carry malaria (Anopheles species) are most active from dusk to dawn. In malaria zones, sleeping under an insecticide-treated bed net is one of the most effective protective measures available.
What Doesn’t Work
Ultrasonic pest repellers, including wearable cards and clip-on devices marketed to hikers and campers, have been repeatedly tested and found ineffective. Multiple researchers have concluded these devices do not repel mosquitoes or other biting insects. Citronella candles provide minimal protection limited to the immediate area around the flame and are far less effective than skin-applied repellents. Wristbands infused with plant oils also perform poorly in controlled testing because they only protect a small zone near the band itself.
Vitamin B supplements, garlic consumption, and phone apps that emit high-frequency sounds have no scientific support for repelling insects. Your money and effort are better spent on proven repellents, treated clothing, and eliminating standing water around your home.