Federal health officials are raising urgent alarms this spring as tick bites climb to their highest levels in nearly a decade. The CDC has confirmed that emergency room visits for tick bites have hit a nine-year peak, and top scientists at Johns Hopkins are warning that the worst may still be ahead.
ER Numbers Tell a Troubling Story Across Every Region
Something is clearly different about the 2026 tick season.
Emergency room visits for tick bites were up more than 25% in April 2026 compared to the same month in 2025, according to the CDC. In nearly every region of the US except the South Central states, weekly ER rates for tick bites are now at the highest level for this time of year since 2017.
The Northeast is bearing the biggest burden. That region recorded 73 emergency department visits per 100,000 ER visits as of mid-May 2026, surging sharply from 58 just two weeks earlier. The Midwest followed close behind, climbing from 40 to 53 in the same period.
| Region | ER Visits per 100,000 (Early May) | ER Visits per 100,000 (Mid-May) |
|---|---|---|
| Northeast | 58 | 73 |
| Midwest | 40 | 53 |
| Southeast | 21 | 24 |
| West | 16 | 18 |
| South Central | 7 | 9 |
These figures do not include people who visited urgent care, called their family doctor, or never sought treatment at all. The real number of tick bite victims this season is almost certainly far larger than any hospital data can capture.
Why This Year’s Tick Season Feels So Much Worse
A combination of factors came together to create near-perfect conditions for ticks to thrive in 2026.
Warmer temperatures allowed more ticks to survive through winter and emerge earlier than usual this spring. A surge in white-footed mice, one of the primary hosts for blacklegged ticks, also helped fuel population growth across the Northeast and Midwest. State data from Michigan alone shows Lyme disease cases have surged nearly 300% over the past three years, and the state is now officially classified as a high-incidence area.
Climate trends are also pushing tick season deeper into the calendar. Researchers say ticks stay active longer when winters are mild and humidity remains high, which stretches the window of risk for millions of Americans who spend time outdoors. Connecticut is already averaging 30 tick submissions per day for testing, with more than 40% coming back positive for the bacteria that causes Lyme disease.
“Unfortunately, it seems that we are in for a very bad year. We see an increasing number of tick infections, tickborne illnesses every year, and it is unlikely this trend is going to change.” Nicole Baumgarth, Director, Lyme and Tickborne Diseases Research and Education Institute, Johns Hopkins Bloomberg School of Public Health
What Lyme Disease Actually Does to the Human Body
Lyme disease is a bacterial infection spread through the bite of infected blacklegged ticks, also known as deer ticks. It is the most commonly reported tick-borne illness in the country, with an estimated 476,000 people treated for it every year.
Early signs include fever, fatigue, headache and a characteristic bull’s-eye rash around the bite. The catch is that only around 70% of infected people ever develop that rash, meaning a significant number of cases go unnoticed until the disease has already started to spread internally.
If left untreated, Lyme disease can move to the joints, heart and nervous system, causing serious and sometimes permanent damage.
One of the main reasons tick bites are so easy to miss is that they are almost always painless. Deer ticks produce specialized proteins that suppress immune response and nerve sensitivity at the bite site, so most people feel nothing at all while the tick feeds. Adult deer ticks are roughly the size of a sesame seed, and the nymphs responsible for most Lyme disease cases in May and June are even smaller, about the size of a poppy seed.
Tick Bites Are Now Linked to a Red Meat Allergy Too
Lyme disease is not the only serious risk tied to tick bites this season, and a new development in Pennsylvania is drawing fresh attention to that reality.
The state has launched new tracking efforts for alpha-gal syndrome, a condition where a tick bite can trigger a lifelong allergy to red meat, dairy and gelatin. About 600 cases have been reported across Pennsylvania over the past two years, and labs have been asked to submit positive cases to health officials since February. Pennsylvania already ranks number one in the nation for reported Lyme disease cases, and experts say alpha-gal syndrome there is almost certainly far more widespread than current numbers reflect.
Alpha-gal syndrome develops when a tick’s saliva transfers a sugar molecule called alpha-gal into the bloodstream, triggering the immune system to react to beef, pork, lamb and other mammal-based foods. Reactions can range from hives and stomach pain to life-threatening anaphylaxis in severe cases.
The condition gained national attention after the first documented death from alpha-gal syndrome was reported last year, involving a New Jersey man who suffered a fatal allergic reaction after eating a hamburger. The CDC estimates that as many as 450,000 Americans may already be living with the condition, most of them without ever connecting it to a tick bite.
How to Protect Yourself Right Now
The CDC’s message is clear: the single best defense is stopping the bite before it ever happens. With tick season now running earlier and longer than it used to, health officials say people should not wait until they are deep in the woods to start taking precautions.
- Apply EPA-registered insect repellents containing DEET, picaridin or IR3535 on exposed skin before going outdoors
- Treat clothing and outdoor gear with 0.5% permethrin, an insecticide that keeps ticks away from fabric
- Wear long sleeves and light-colored clothing so ticks are easier to spot before they attach
- Walk in the center of trails and avoid tall grass, brush and leaf litter where ticks wait for hosts
- Do a full-body check on yourself, your children and your pets after coming indoors
- Shower within two hours of being outside to wash off any ticks that have not yet attached
If you find an attached tick, remove it right away using fine-tipped tweezers. Grip the tick as close to the skin as possible and pull upward in a slow, steady motion without crushing or twisting it. Removing a tick within 24 hours is one of the most effective ways to prevent Lyme disease from being transmitted.
See a doctor promptly if you develop a rash, fever or flu-like symptoms in the days or weeks after a bite, or after spending time in wooded or grassy areas. Early antibiotic treatment is highly effective when Lyme disease is caught in its early stages, and a single preventive dose of doxycycline may be offered to people bitten in high-risk areas.
The 2026 tick season is shaping up to be one of the most serious public health stories of the spring, fueled by a changing climate, growing wildlife populations and a creature so small it is almost invisible until real harm may already be done. With 31 million Americans bitten by ticks every year, a growing list of diseases they carry, and numbers still climbing week by week, this is not a distant threat. It is happening in backyards, parks and hiking trails right now, across nearly every corner of the country. Take a few minutes this week to check yourself, your kids and your pets. That simple habit could make all the difference this summer.
Have you or someone you know been affected by a tick bite this season? Share your experience and thoughts in the comments below.
