Apply an EPA-registered repellent to exposed skin or clothing only, following the label’s directions exactly.
Getting bitten by mosquitoes or ticks can derail a trip faster than a lost passport. The right way to prevent it isn’t complicated, but most people make at least one mistake — often spraying repellent under clothing or directly on their face. This guide walks through the CDC’s recommended technique for bug repellent for travel, step by step.
The Products That Actually Work
These are considered safe and effective when used as directed.
Each works differently, but the application method is the same. Your choice comes down to how long you need protection and how you feel about each ingredient’s feel and smell.
Applying Repellent the Right Way
Start with exposed skin only. Spray a thin, even layer — just enough to cover the area. Heavy saturation is unnecessary and won’t extend how long the product works.
- Face: Never spray repellent directly on your face. Spray your hands first, then pat the repellent onto your face, avoiding your eyes and mouth. Go sparingly around the ears.
- Under clothing: Do not apply repellent to skin that will be covered. The CDC is explicit: treated skin stays under clothing.
- Broken skin: Keep repellent away from cuts, wounds, sunburns, rashes, and irritated skin.
- Hands: Avoid applying to children’s hands — they end up in mouths and eyes.
After you come back indoors, wash treated skin with soap and water, especially if you’ve reapplied several times during the day.
Pairing Repellent with Sunscreen and Clothing
If you’re using both sunscreen and repellent, the order matters: sunscreen goes on first, then repellent on top. That keeps the repellent from diluting your sun protection, and it lets each product do its job.
One common mistake is buying a combined sunscreen-and-repellent product. The CDC recommends separate products because sunscreen needs reapplication every couple of hours, while repellent should only be reapplied as often as its label directs — often far less frequently.
For clothing and gear, permethrin is the right tool — it’s designed for fabric, not skin. Treat your pants, socks, and tent beforehand and let them dry. For a rundown of the best sprays and lotions for your trip, see our tested roundup of the best bug repellent for travel.
| Scenario | Correct Approach | Common Mistake |
|---|---|---|
| Face | Spray hands, pat on, avoid eyes and mouth | Spraying directly at the face |
| Sunscreen combo | Sunscreen first, repellent second | Using a 2-in-1 product |
| Under clothing | Leave untreated | Applying beneath fabric |
| Children | Adult applies, keep off hands | Letting kids handle it |
| Clothing and gear | Permethrin on fabric | Using skin repellent on gear |
Travel Rules and Reapplication Timing
Flying with repellent is straightforward. The TSA allows skin-applied bug repellent in both carry-on and checked luggage, subject to the standard 3-1-1 liquids rule. What’s not allowed is insecticide meant to spray in the air or at insects — those are prohibited in either bag.
Reapplication is the part people get wrong. Use the interval printed on the product’s label, and don’t reapply more often than that. Many repellents last several hours, so resist the urge to top up every hour “just in case.”
And the same rules above apply — it’s about following the label, not avoiding the product.
References & Sources
- CDC Yellow Book. “Mosquitoes, Ticks & Other Arthropods.” Authoritative guidance on repellent ingredients and application for travelers.
- EPA. “Using Insect Repellents Safely and Effectively.” Official instructions on applying repellents correctly.
- CDC Travelers’ Health. “Avoid Bug Bites.” Practical guidance on repellents, permethrin, and child safety.
FAQs
Can I put bug spray on over sunscreen?
Yes, and sunscreen should go on first. Applying repellent over sunscreen lets each product work without interference. The CDC also recommends using separate products rather than a combined sunscreen-repellent formula, since sunscreen needs more frequent reapplication than most repellents.
Is DEET safe for kids?
Keep it off their hands and away from their eyes and mouth. The concentration affects duration, not safety — follow the label’s age guidance and reapplication schedule.
Does bug repellent expire?
Yes. Check the bottle’s expiration date before packing. If there’s no date printed, replace it if you can’t remember when you bought it — an old repellent is better than nothing, but not much.