Stopping bug bites comes down to three layers of defense: keeping insects off your skin, keeping them out of your space, and reducing their numbers around your home. No single method works perfectly on its own, but combining a few proven strategies cuts your exposure dramatically.
Choose the Right Repellent
The EPA registers eight active ingredients for skin-applied insect repellents: DEET, picaridin, IR 3535, oil of lemon eucalyptus, p-menthane-3,8-diol (PMD), oil of citronella, catnip oil, and 2-undecanone. Of these, DEET and picaridin are the most widely available and best studied.
Concentration matters more than brand. Products with less than 10% active ingredient typically protect for only one to two hours. Higher concentrations extend that window, but DEET’s effectiveness peaks around 50%, meaning a 30% product and a 100% product don’t differ as much as you’d expect. For a few hours outdoors, 20% to 30% DEET or picaridin covers most situations. For all-day hikes or travel in tropical areas, go higher.
If you’re also wearing sunscreen, apply sunscreen first and repellent second. Sunscreen needs reapplying every two hours, while repellent lasts longer. Avoid combination sunscreen-repellent products for this reason: you’ll end up over-applying repellent or under-applying sunscreen.
Treat Your Clothing With Permethrin
Repellent on your skin handles exposed areas. For everything else, permethrin-treated clothing adds a second barrier. Permethrin is an insecticide, not a repellent. It kills or disables mosquitoes and ticks on contact with the fabric. The EPA has reviewed efficacy data for factory-treated clothing and confirmed it works against both.
You can buy pre-treated shirts, pants, and socks, or spray your own gear with a permethrin solution. Small amounts wash out over time, so factory-treated items generally last longer than DIY applications. Either way, never apply permethrin directly to your skin.
For the best protection, pair treated clothing with a skin repellent on exposed areas like hands, neck, and face. This two-layer approach is standard advice for anyone spending time in tick-heavy or mosquito-dense environments.
Eliminate Standing Water Around Your Home
Mosquitoes need surprisingly little water to breed, and they work fast. Standing water plus seven days equals mosquitoes. A bottle cap’s worth of water is enough for a small batch of eggs to develop into biting adults. Walk your yard weekly and address these common trouble spots:
- Planter saucers: Dump them every three to five days, or remove them entirely.
- Bird baths: Change the water at least once a week.
- Kiddie pools: Empty or change the water every five to seven days.
- Garbage cans and recycling bins: Make sure lids fit tightly, and take recycling out weekly so containers don’t collect rain.
- Wheelbarrows, tarps, and toys: Flip them over or store them in a shed. Check crevices weekly.
Gutters clogged with leaves, old tires, and even the foot wells of jet skis on trailers are breeding sites people overlook. Anything that holds water for a week is a mosquito nursery.
Use Physical Barriers
Screens and netting are your simplest, most reliable line of defense indoors and while sleeping. The World Health Organization recommends a minimum mesh count of 156 holes per square inch for blocking mosquitoes. In tropical areas where malaria and dengue are concerns, nets with 180 to 200 mesh provide tighter protection while still allowing airflow.
Standard window screens in North America generally meet these thresholds for mosquitoes, but they won’t stop smaller biters like no-see-ums (biting midges). If you’re dealing with those, you need much finer mesh, around 400 or higher. In parts of Scandinavia and Scotland where midges are severe, mesh counts of 1,000 or more are used.
When sleeping outdoors or in areas without screened windows, a bed net tucked under the mattress is one of the most effective bite-prevention tools available. Permethrin-treated nets add a chemical barrier on top of the physical one.
What About Natural Repellents?
Plant-based options vary enormously. Oil of lemon eucalyptus is the standout: it’s EPA-registered and performs comparably to low-concentration DEET in many tests. Citronella oil is also registered but provides shorter protection, often requiring frequent reapplication.
Research from the USDA found that fatty acids derived from coconut oil showed surprisingly strong results. In field trials on cattle, a starch-based formula containing coconut fatty acids repelled stable flies for up to 96 hours, while DEET was only 50% effective against the same flies. Against bed bugs and ticks, DEET lost effectiveness after about three days, while the coconut compound lasted roughly two weeks. Against mosquitoes, including the species that transmits Zika, coconut fatty acids achieved over 90% repellency. These results are promising, though the specific formulations used in research aren’t the same as grabbing a bottle of coconut oil from your kitchen.
The general trade-off with natural repellents is duration. Most wear off faster than synthetic options, so you’ll reapply more often.
Skip Ultrasonic Devices
Ultrasonic repellers, those small plug-in or pocket-sized gadgets that claim to drive away mosquitoes with high-frequency sound, don’t work. Multiple independent reviews have concluded that these devices do not effectively repel insects. Most insects hear roughly the same frequency range humans do, so if the sound isn’t bothering you, it isn’t bothering them either. Your money is better spent on repellent or screens.
Check for Ticks After Being Outdoors
Ticks don’t fly or jump. They grab onto you from grass and brush, then crawl to a warm, hidden spot before biting. A full-body tick check after spending time outside is one of the most effective ways to catch them before they attach or transmit disease. Ticks favor specific areas on the body:
- Head and hair: Run your fingers through your scalp, especially along the hairline.
- Ears: Check in and behind both ears.
- Underarms and chest
- Waist and belly button
- Groin area
- Behind the knees and between the toes
- Back: Use a mirror or ask someone to check for you.
Showering within two hours of coming indoors helps wash off unattached ticks and gives you a natural opportunity to do a thorough check. Toss your clothes in the dryer on high heat for 10 minutes to kill any ticks hiding in the fabric, even before washing.
Dress to Reduce Exposed Skin
Long sleeves, long pants, and closed-toe shoes reduce the surface area available to biting insects. Tucking pants into socks looks ridiculous, but it forces ticks to crawl on the outside of your clothing where you can spot them, rather than sneaking underneath to your skin. Light-colored clothing makes ticks and mosquitoes easier to see and may attract fewer mosquitoes than dark colors, which retain more heat and carbon dioxide signatures.
Loose-fitting clothes also help. Mosquitoes can bite through tight fabric that presses against your skin, but they can’t reach through a layer of air between a loose shirt and your body.