This story originally appeared on massgeneralbrigham.org

Preventing and Detecting Lyme Disease in Kids

During summer, kids and parents alike are eager to get outside. But in the back of many parents’ minds lurks a common worry: Lyme disease.

Lyme disease is a bacterial infection spread by tick bites. It’s worth paying attention to — especially since cases have been rising over the last decade or so. But that doesn’t mean you need to forego time in the great outdoors, explains Daniel A. Solomon, MD, a Mass General Brigham infectious diseases doctor who cares for patients at Brigham and Women’s Hospital.

“It’s important to be attuned to symptoms that could be early signs of Lyme disease. It’s easiest to treat when it’s identified early,” Dr. Solomon says. “And there are a lot of things you can do to decrease the risk for you and your family.”

Who is at risk for Lyme disease?

Lyme disease cases have been reported all over the U.S. But it’s most common in the Northeast and the upper Midwest area of Wisconsin and Minnesota. “Those are the hot spots where we see by far the most cases,” Dr. Solomon says.

Lyme disease risk is greatest during late spring and early summer, when ticks are most active. It can affect people of all ages who spend time outside. The disease is spread by black-legged ticks, which spend their lives low to the ground in grasses and shrubs. “The biggest risk comes from being outside in grassy areas or wooded areas with low bushes,” Dr. Solomon says.

Lyme disease prevention

The best way to protect your kids (and yourself) from Lyme disease is to prevent tick bites in the first place. These strategies can help:

• Wear long pants and socks when you’re in areas with low shrubs and long grasses.
• Wear light-colored clothing. Ticks are black, so they’re easier to spot against a lighter colored background.
• Treat clothes and shoes with permethrin, a chemical that repels ticks. The insecticide is safe for kids but isn’t designed for use on skin. Instead, it should be sprayed on clothing to keep ticks at bay.
• Use bug spray containing DEET to help ward off ticks. Insect repellants with no more than 30% DEET are safe for kids older than 2 months. But it can be toxic if swallowed, so don’t let younger kids spray themselves. When spraying DEET on children, avoid getting it on their hands or near their eyes and mouth.
• Put clothes in the dryer on high heat for 10 minutes after you come inside. “That will kill any ticks that are crawling on the clothes,” Dr. Solomon says.
• Shower to wash off any ticks that haven’t attached yet. Then do a thorough tick check afterward. They like to hide in dark crevices, so check out-of-the-way spots like the underarms, behind the knees, behind ears, inside the belly button, and in the groin.

I found a tick. Now what?

Ticks attach to the skin with their mouthparts, and can stay attached for many hours. To remove one, use tweezers to grab the tick as close to the skin as possible and pull straight up. Sometimes, little bits of mouthparts are left in the skin. “Don’t dig them out, because you could cause an infection,” Dr. Solomon says. They will work their way out on their own.

The good news: It takes time for the Lyme disease bacterium to move from the tick into a person’s blood. If you know the tick was attached for less than 36 hours, it probably didn’t have time to spread the disease.

If you live in an area where Lyme disease is common, and aren’t sure how long the tick was attached, Dr. Solomon recommends taking action to prevent getting sick. You can ask your doctor for “post-exposure prophylaxis” — a single dose of the antibiotic doxycycline. “That single-dose treatment is very effective at decreasing the risk of Lyme disease,” he says. “It’s safe for kids and adults, but you need to take it within 72 hours of the tick bite, and ideally as soon as possible.”

“Commonly, we just see a reddish circle or oval, without that area of central clearing,” he says. “And on darker skin, it might not look red—it can just look like a darker patch of skin.”

What Lyme rashes usually have in common:

• Timing: A rash usually occurs within the first week or so after a tick bite.
• Size: The rash from Lyme disease tends to get pretty big, at least 5 centimeters across.
• Spread: Lyme disease rashes grow bigger over time. “If it’s just a small dot, keep an eye on it for a few days,” he says. “If it doesn’t grow or move, it’s most likely not Lyme disease.”

View images of Lyme disease rash on different skin tones from the Centers for Disease Control and Prevention (CDC).

Symptoms of early Lyme disease

For many people, a rash is the only symptom of early Lyme disease. But about a third of people have symptoms that extend beyond the skin:

• Low-grade fever
• Muscle aches
• Fatigue

“If you have what seems like a summer flu, it could be early-stage Lyme disease,” Dr. Solomon says.

Symptoms of later-stage Lyme disease

If Lyme disease isn’t diagnosed and treated early, it can spread through the body, advancing to Stage 2 Lyme disease. Symptoms of Stage 2 typically show up 3 to 10 weeks after the tick bite.

Symptoms can include:

• Heart rhythm problems
• Bell’s palsy (weakness or paralysis on one side of the face)
• Numbness or pain

If it continues untreated, that can advance to Stage 3 Lyme, with symptoms such as:

• Arthritis (stiff, swollen joints)
• Muscle weakness or twitching
• Speech problems
• Cognitive problems (difficulty with thinking and memory)