Learn About Lyme Disease


Although Lyme disease is transmitted by the bite of a tick, (See http://www.cdc.gov/lyme/transmission/index.html) knowledge of any given tick bite is not helpful to predicting whether or not you may have Lyme disease: the majority of individuals that contract Lyme disease will not remember the tick bite. Also, only 2% of tick bites result in Lyme disease. Late spring and early summer are the highest risk season for Lyme disease, when the nymphal stage of the ticks emerge. Adults ticks are present year round and can be feeding any time when temperature exceed 40 degrees. Although both genders and all ages are susceptible, Lyme disease is most common among boys aged 5-19 and adults 30 or older.

If you think you may have Lyme disease,
it is important to consult your health care provider

The prognosis for recovery is best when Lyme disease is diagnosed and treated in its earliest phase. But remember, treatment doesn’t make you immune; you can get Lyme again if another infected tick bites you.

What To Do After a Tick Bite
Removing Ticks

If you or a loved one is bitten, remove the tick promptly. Here’s how:

Recognizing the Rash
Requesting and Receiving Care

If you have a tick bite, watch for an expanding red rash or lesion at the site of the tick bite or an unexplained feverish, achy, fatiguing illness within 1 to 4 weeks after the tick bite. If this doesn’t happen, you are probably among the 98% of people who don’t develop Lyme disease after a tick bite. If you are concerned about any of these findings, take a picture of the rash and contact your physician.

Symptoms of Lyme Disease
Flu-like symptoms
  • Fever, chills, fatigue, body aches, swollen glands, and a headache may accompany the rash.
  • In some cases, these may be the only symptoms of infection and there is no rash.
Neurological problems
  • In some cases, inflammation of the membranes surrounding the brain (meningitis), temporary paralysis of one side of the face (“Bell’s palsy), numbness or weakness in limbs, and impaired muscle movement may occur weeks or months, after an untreated Lyme disease infection.
  • Other problems can occur months to years later and include difficulty with short-term memory, migraines, dizziness, ‘brain fog’, poor sleep, lack of verbal fluency, confusion or disorientation, and decreased ability to concentrate.
  • Lyme has also been found to mimic several psychiatric disorders.
    Joint pain
    • Untreated, the infection may cause severe joint pain and swelling from several weeks to months after infection.
    • Knees are often affected, but the pain can shift from one joint to another.
    Other Symptoms
    • Some people experience irregular heartbeat several weeks after infection, rarely lasting more than a few days or weeks.
    • Eye inflammation, hepatitis, shooting pains, and severe fatigue are also possible.

When To See a Doctor

If you are bitten by a tick and develop the rash or symptoms of Lyme disease — especially if you live or vacation where Lyme is prevalent, contact your doctor immediately. Treatment is most effective if begun early. Although only a small number of tick bites lead to Lyme disease: the longer the tick remains attached to your skin, the greater your risk of getting the disease.

How Lyme Disease is Diagnosed

Lyme disease is a clinical diagnosis made by a doctor or nurse examining the patient. Early Lyme is not a laboratory diagnosis: a negative Lyme blood test doesn’t rule out Lyme in the first few weeks of the illness. Also, 20% of people have no rash, only a “flu like” illness. Fever, aches and abrupt severe fatigue can be the main symptoms of acute Lyme disease. Lyme is different from a respiratory “cold” and does not cause a runny nose or a prominent cough.

Tick bite reactions are small and do not get bigger over several days. If you have a tick bite, watch the site for signs of a growing red rash in the next 1 - 3 weeks. Small, red reactions less than 1-2” in size (the size of a dime) are common do not represent Lyme disease. These are tick-bite reactions, often confused with the rash of Lyme disease. With a tick-bite reaction, the red area does not expand over 24 to 48 hours. Small reactions at the bite site can last days to weeks.

The earliest stage of Lyme disease occurs at the site of the tick bite. If the rash is Lyme, it will get bigger over days or weeks and will not fade over the next few days. Only 2% of tick bites result in Lyme disease. A Lyme rash occurs at the site of the tick bite in 80% of people who have early Lyme disease. The incubation period from a tick bite to the development of a rash is 3-30 days (usually 3-10 days).

The Lyme rash is red and round or oval and is called erythema migrans. It may have the distinctive bull’s-eye appearance. Often, the rash is uniformly red and usually more than 2” across - often as large as 6-8”. It is sometimes confused with a spider bite.

What Is Not Lyme Disease