Tick Activity Surges: How to Protect Yourself During the 2026 Season

As warmer weather draws more people outdoors, health officials are issuing urgent warnings about a significant rise in tick activity. Recent data indicates that the current season is posing a heightened risk for tick-borne illnesses, most notably Lyme disease, prompting federal health agencies to urge the public to prioritize prevention and early detection.

A Concerning Trend in Tick-Borne Exposure

The Centers for Disease Control and Prevention (CDC) has reported a troubling spike in emergency room visits related to tick bites. According to the CDC’s Tick Bite Tracker, weekly rates of ER visits are currently the highest they have been for this time of year since 2017 across all regions of the United States, with the exception of the South Central region.

This surge comes just as May begins, which is recognized as Lyme Disease Awareness Month. With an estimated 31 million people in the U.S. Bitten by ticks annually, the potential for widespread infection is high. Lyme disease remains the most common tick-borne illness in the country, with approximately 476,000 patients treated for the condition each year.

“Tick season is here and these tiny biters can make you seriously sick,” says Alison Hinckley, PhD, an epidemiologist and Lyme disease expert with the CDC’s Division of Vector-Borne Diseases.

The “Stealth Predator”: Understanding the Black-Legged Deer Tick

The primary culprit behind the spread of Lyme disease is the black-legged deer tick. These parasites are exceptionally difficult to detect due to their size and biological adaptations. Adult deer ticks are roughly the size of a sesame seed, but the nymphs—which emerge in May and are responsible for the majority of Lyme disease cases—are even smaller, often resembling a poppy seed or the tip of a pencil.

Beyond their size, these ticks employ a chemical strategy to avoid detection. Constantin Takacs, an assistant professor of biology at Northeastern University, explains that black-legged deer ticks produce specialized proteins at the bite site. These proteins work to suppress the host’s nerve sensitivity and immune system, allowing the tick to feed undisturbed and undetected.

While Lyme disease is the most prevalent concern, the black-legged deer tick is also capable of transmitting other serious illnesses, including babesiosis and the Powassan virus. Other tick species can transmit Rocky Mountain spotted fever and alpha-gal syndrome.

Recognizing Symptoms and Risks

Early identification of tick-borne illness is vital for a full recovery. Symptoms of Lyme disease often initiate with non-specific flu-like signs, including:

• Fever and fatigue
• Headache
• Muscle aches and pains
• Swollen lymph nodes

A hallmark sign of Lyme disease is the development of a circular “bull’s-eye” rash. However, not all patients develop this rash. If left untreated, the infection can progress to more severe complications, such as facial paralysis, arthritis, and an irregular heartbeat.

Evidence-Based Prevention Strategies

Preventing the bite is the most effective way to avoid tick-borne diseases. Health experts recommend a multi-layered approach to protection when spending time outdoors.

1. Use Approved Repellents

Apply EPA-registered insect repellents to exposed skin. For clothing, use permethrin-treated gear, which is highly effective at deterring ticks.

2. Conduct Thorough Tick Checks

After returning from wooded or grassy areas, perform a full-body check. Ticks often hide in warm, hidden areas such as the armpits, behind the knees, and in the hairline.

3. Rapid Removal

If you find an attached tick, do not wait to visit an emergency room to have it removed. Removing the tick as soon as possible—ideally within 24 hours—can significantly help prevent the transmission of Lyme disease.

4. Monitor Your Health

If you develop a fever or rash in the days or weeks following a bite, or after spending time in tick-prone areas, seek medical care promptly.

Frequently Asked Questions

How small are the ticks that cause Lyme disease?

Adult black-legged deer ticks are about the size of a sesame seed, while the nymphs, which are most active in May, are as small as a poppy seed or a pencil tip.

Why don’t I feel the tick when it bites me?

Black-legged deer ticks secrete specialized proteins that numb the skin and suppress the immune response at the bite site, making the bite virtually painless and undetectable.

What is the most important step after finding a tick?

The most critical action is to remove the tick immediately. Removing the parasite within 24 hours is a key factor in preventing the onset of Lyme disease.