Tick-Borne Illness Has More Than Doubled in the U.S. — What You Need to Know to Stay Safe This Season
Tick-borne disease used to feel like a Northeast problem. It’s not anymore. Cases have more than doubled nationally over the past 13 years, and positive Lyme tests have now been recorded in all 50 states. If you spend any time outdoors, this is worth understanding before the season gets going.
The CDC estimates around 476,000 Americans are diagnosed and treated for Lyme disease each year, with fewer than 10% of cases officially reported. A February 2026 PubMed study confirmed that Lyme cases in children are now climbing fastest in the Midwest, and the Johns Hopkins Lyme Dashboard shows positive tests reaching every corner of the country.
Why Tick Season Keeps Getting Longer
Warmer winters are a big part of the story. Without hard freezes killing ticks off, populations are surviving in higher numbers and becoming active earlier each spring. Nationally, tick season runs April through September, but ticks stay active at any temperature above freezing.
Dr. Robert Adams, an ER physician at IU Health Bloomington, put it plainly: this is a national trend, not a regional one. Indiana’s recent numbers back that up. The Herald-Times reported that Monroe County led the state in ehrlichiosis cases for three of the past five years, with 18 human cases recorded in 2025. A local health worker collected 574 ticks across just seven parks that same summer. Indiana also confirmed its first documented human Heartland virus case in 2025, a tick-borne illness with no antibiotic treatment, which makes prevention the only real protection.
What You’re Up Against
The range of tick-borne illnesses has grown considerably: Lyme disease, Rocky Mountain Spotted Fever, ehrlichiosis, anaplasmosis, babesiosis, Powassan virus and Heartland virus are all in circulation. Alpha-gal syndrome is one that catches people off guard. Triggered by lone star tick bites, it causes an allergy to red meat that can escalate fast enough to require emergency care. Many people have no idea they have it until a reaction hits.
Timing matters too. Most tick-borne illnesses need around 48 hours of attachment to transmit, which gives daily checks real protective value. Powassan virus is the exception and can transmit in as little as 15 minutes. Nymph-stage ticks, active right now through early summer, are roughly the size of a poppy seed and easy to miss.
What Actually Works for Prevention
For conventional protection, EPA-registered repellents with DEET, picaridin (20%) or oil of lemon eucalyptus on exposed skin are your strongest options. Don’t use OLE or PMD on children under 3. Treating clothing and gear with 0.5% permethrin adds reliable protection that holds through multiple washes; keep it off skin directly.
If you’d rather go a more natural route, there’s real science behind some of the options. Oil of lemon eucalyptus is the only plant-based repellent the CDC formally recommends, and after six hours it can outperform DEET against lone star ticks. A peer-reviewed Springer Nature study found spearmint and oregano oils on clothing resulted in significantly fewer ticks, with spearmint performing comparably to 20% DEET.
A Scientific Reports study identified clove oil and cinnamon oil lotion emulsions as providing the longest protection of 20 natural ingredients tested. Natural options need reapplication every one to two hours and work best alongside other prevention habits rather than on their own.
After coming indoors, shower within two hours and tumble dry clothes on high heat for 20 minutes. Both steps help remove or kill ticks before they have a chance to attach.
Your Daily Tick Check
A thorough body check every day is one of the highest-value habits you can build this time of year. Focus on the scalp, behind the ears, underarms, belly button, behind the knees, between the legs and the back of the neck. Use a mirror or ask someone to check spots you can’t easily see.
Yard and Pets
Keep grass mowed short and clear out leaf litter. A three-foot barrier of gravel or wood chips between your lawn and any wooded or brushy areas creates a zone ticks can’t cross. Treat pets with vet-recommended tick prevention and check them every time they come inside. They’re one of the most common ways ticks make it into your home.
If You Find a Tick
Grasp it with fine-tipped tweezers as close to the skin as possible and pull upward with steady, even pressure. Never twist. Wash the area thoroughly and save the tick in a small container or on tape so you can identify the species if symptoms appear later. Watch for a bull’s-eye rash or flu-like symptoms including fever, body aches and nausea in the days and weeks following a bite. See a doctor promptly if either shows up.
Tick season keeps expanding, but awareness and a consistent routine are genuinely enough to lower your risk significantly all season long.
This article was created by content specialists using various tools, including AI.
