Pediatric Lyme Disease: Symptoms in Children and Toddlers
Lyme disease symptoms in children and toddlers
Early signs, behavior changes, and testing limitations
When parents should seek medical evaluation
Pediatric Lyme disease symptoms can be difficult to recognize because children may not describe pain, fatigue, headaches, or cognitive changes as clearly as adults.
Parents may first notice an expanding rash, fever, fatigue, headaches, joint pain, facial weakness, limping, irritability, sleep disruption, or an unexpected decline in school performance. In toddlers and younger children, reduced activity or a change in behavior may be among the first indications that something is wrong.
Lyme disease should be considered when a child develops new or unexplained symptoms after possible tick exposure, even when no tick bite was noticed. However, these symptoms have many possible causes and require a careful medical evaluation rather than being attributed automatically to Lyme disease.
What Are the Early Signs of Lyme Disease in Children?
Early Lyme disease symptoms in children may begin days to weeks after the bite of an infected blacklegged tick. Possible signs include:
- An erythema migrans rash
- Fever or chills
- Fatigue or reduced activity
- Headaches
- Muscle and joint aches
- Swollen lymph nodes
- General flu-like symptoms
The erythema migrans rash may expand gradually over several days. It does not always resemble a classic bull’s-eye and may be difficult to identify on darker skin or in areas hidden by hair or clothing.
Not every child develops a recognized rash, and many children and parents do not remember a tick bite. Nymphal ticks can be especially difficult to notice because of their small size.
Common Pediatric Lyme Disease Symptoms
Lyme disease may affect the skin, joints, nervous system, and, less commonly, the heart. Symptoms vary according to the stage and manifestation of the illness.
Symptoms reported in children may include:
- Fatigue
- Headaches
- Muscle aches or joint pain
- Joint swelling, particularly involving a knee
- Facial weakness or drooping
- Neck pain or stiffness
- Dizziness
- Numbness, tingling, or shooting pain
- Sleep disturbances
- Difficulty concentrating
- Irritability or mood changes
Symptoms may develop at different times and do not always follow a predictable sequence. A child can also have more than one manifestation of Lyme disease.
Lyme Disease Symptoms in Toddlers and Young Children
Lyme disease in toddlers can be particularly challenging to recognize because younger children may not have the words to describe fatigue, pain, dizziness, or cognitive difficulty.
Parents may notice:
- Unusual irritability or persistent crying
- Reduced play or physical activity
- Changes in sleep
- Limping or refusing to walk
- Favoring one arm or leg
- A swollen joint
- Loss of appetite
- Clinginess or withdrawal
- An unexplained decline in previously established activities
A toddler who suddenly begins limping may have an injury or another medical condition. However, Lyme arthritis should be included in the evaluation when there is possible tick exposure, particularly if a knee or another large joint is swollen.
Neurologic and Cognitive Symptoms in Children
Neurologic Lyme disease may cause facial palsy, severe headaches, neck stiffness, nerve pain, weakness, numbness, tingling, or sensitivity to light. Facial palsy can affect one or both sides of the face.
Some children also experience cognitive complaints such as brain fog, slowed processing, memory difficulty, sound sensitivity, or fluctuating concentration. These symptoms may interfere with classroom participation, homework, reading, or the ability to complete assignments on time.
Because cognitive complaints are not specific to Lyme disease, clinicians should consider other medical, neurologic, sleep-related, developmental, and psychological explanations as part of the evaluation.
Learn more about neurologic Lyme disease.
When Lyme Disease Looks Like Stress or Behavioral Change
Physical illness can affect a child’s mood, sleep, attention, motivation, and behavior. Some children with Lyme disease may become irritable, anxious, withdrawn, unusually emotional, or less able to tolerate ordinary demands.
Parents or teachers may describe the child as:
- “Anxious” or “moody”
- “Struggling to pay attention”
- “Unmotivated”
- “Withdrawing from friends or activities”
- “No longer performing at the same level in school”
These changes can resemble ADHD, anxiety, depression, stress, or an adjustment problem. Lyme disease does not explain every sudden behavioral or academic change, but a broader medical evaluation may be appropriate when the change is accompanied by fatigue, headaches, pain, sleep disruption, neurologic symptoms, a rash, or possible tick exposure.
Related: Sudden behavior changes in children and Lyme disease
How Is Lyme Disease Diagnosed in Children?
Diagnosing pediatric Lyme disease begins with the child’s history, symptoms, physical examination, exposure risk, and the timing of the illness.
Clinicians should consider:
- Residence in or travel to an area where Lyme disease occurs
- Outdoor activities and possible tick exposure
- The appearance and timing of any rash
- Neurologic, cardiac, or joint findings
- Other illnesses that could explain the symptoms
- Laboratory testing when appropriate
An expanding erythema migrans rash in a child with plausible tick exposure may allow a clinical diagnosis without waiting for an antibody test.
Learn more: When to test a child for Lyme disease
Can a Child Have Lyme Disease With a Negative Test?
Yes. Lyme disease antibody tests can be falsely negative during the first several weeks of infection because the child may not yet have developed a detectable antibody response.
Testing becomes more useful as the immune response develops. Depending on the timing and clinical circumstances, a clinician may consider repeat testing after an initially negative early test.
A negative result later in the illness requires a more nuanced interpretation. The clinician should consider the type of test used, timing, prior antibiotic treatment, objective findings, exposure risk, and alternative diagnoses.
No laboratory test should be interpreted without the child’s clinical history. At the same time, nonspecific symptoms alone do not establish a diagnosis of Lyme disease.
How Is Pediatric Lyme Disease Treated?
Pediatric Lyme disease is treated with antibiotics. Common oral options include doxycycline, amoxicillin, and cefuroxime. The antibiotic, dose, route, and duration depend on the child’s age and weight, the manifestation of Lyme disease, allergies, medical history, and illness severity.
Many children with an erythema migrans rash or uncomplicated early Lyme disease can be treated with oral antibiotics. Children with certain neurologic, cardiac, or joint manifestations may require a different duration, closer monitoring, specialist evaluation, or intravenous treatment.
Doxycycline may be used in children when clinically appropriate, including selected situations in children younger than eight. Treatment decisions should be made by the child’s clinician rather than delayed because of assumptions about age alone.
Most children improve with appropriate treatment, particularly when Lyme disease is recognized early. Some children, however, may have symptoms that take longer to resolve and require continued clinical follow-up.
When Should Parents Seek Urgent Medical Care?
Prompt medical evaluation is important if a child develops an expanding rash, facial drooping, a swollen joint, persistent fever, or significant neurologic symptoms after possible tick exposure.
Urgent evaluation may be necessary for:
- Fainting or near-fainting
- Chest pain or heart palpitations
- Shortness of breath
- Severe headache with neck stiffness
- Facial weakness or new limb weakness
- Difficulty walking
- Confusion or a significant change in alertness
These symptoms can have causes other than Lyme disease and should not be evaluated solely through an online symptom checklist.
Why Early Recognition Matters
Delayed recognition of pediatric Lyme disease may prolong symptoms and create unnecessary distress for children and their families.
Early recognition may help:
- Guide timely evaluation and treatment
- Reduce the risk of later manifestations
- Prevent physical symptoms from being mislabeled as purely behavioral
- Support appropriate school accommodations during recovery
The goal is not to assume that every unexplained symptom is Lyme disease. It is to avoid overlooking a potentially treatable tick-borne illness when the exposure history and clinical pattern warrant consideration.
Frequently Asked Questions
What are the symptoms of Lyme disease in children?
Lyme disease symptoms in children may include an expanding rash, fever, fatigue, headaches, muscle or joint pain, a swollen knee, facial palsy, sleep problems, concentration difficulties, irritability, or declining school performance.
What are the signs of Lyme disease in toddlers?
Signs of Lyme disease in toddlers may include irritability, reduced activity, sleep changes, limping, refusing to walk, favoring one limb, joint swelling, fatigue, fever, or an expanding rash.
Can children get Lyme disease without a rash?
Yes. Not every child develops or notices an erythema migrans rash. A rash may also be hidden, mistaken for another skin condition, or difficult to recognize on darker skin.
Can Lyme disease cause behavior changes in children?
Some children with Lyme disease may develop irritability, mood changes, sleep disruption, withdrawal, or concentration problems. Because these symptoms are not specific to Lyme disease, other medical, developmental, and psychological causes should also be considered.
Can Lyme disease look like ADHD in children?
Lyme disease symptoms may sometimes overlap with ADHD-like concerns, including inattention, restlessness, difficulty completing work, or declining school performance. A sudden change accompanied by physical symptoms or possible tick exposure may warrant a broader medical evaluation.
Can a child have Lyme disease with a negative test?
Yes. Antibody tests may be falsely negative during the first several weeks of infection. The result should be interpreted according to symptom timing, exposure risk, physical findings, prior treatment, and the possibility of other diagnoses.
How is Lyme disease treated in children?
Lyme disease in children is treated with antibiotics such as doxycycline, amoxicillin, or cefuroxime. The medication, dose, route, and duration depend on the child’s age and weight, clinical manifestation, medical history, and illness severity.
Clinical Takeaway
Pediatric Lyme disease may present with recognizable findings such as an expanding rash, facial palsy, or a swollen knee. In other children, the first signs may be fatigue, headaches, limping, reduced activity, irritability, concentration problems, or declining school performance.
The diagnosis should not be based on one nonspecific symptom. Clinicians must connect possible tick exposure, symptom timing, physical findings, neurologic or cognitive changes, laboratory results, and alternative explanations.
When a child develops new physical, neurologic, behavioral, or school-related changes after possible tick exposure, Lyme disease deserves careful consideration as part of a broader medical evaluation.
Related Articles
Why Lyme disease is often misdiagnosed
Lyme disease symptoms guide
Lyme disease coinfections
Delayed Lyme disease diagnosis
Persistent Lyme disease
References
- Meissner HC, Steere AC. Management of pediatric Lyme disease: Updates from 2020 Lyme guidelines. Pediatrics. 2022;149(3):e2021054980.
- Centers for Disease Control and Prevention. Signs and symptoms of untreated Lyme disease. Updated May 15, 2024.
- Centers for Disease Control and Prevention. Clinical testing and diagnosis for Lyme disease. Updated May 15, 2024.
- Centers for Disease Control and Prevention. Clinical treatment of erythema migrans rash. Updated March 27, 2026.
- Centers for Disease Control and Prevention. Clinical care and treatment of neurologic Lyme disease. Updated March 5, 2025.
Dr. Daniel Cameron, MD, MPH
Lyme disease clinician with over 30 years of experience and past president of ILADS.
Symptoms • Testing • Coinfections • Recovery • Pediatric • Prevention
