Chronic infections
Epstein-Barr virus, mold illness, Lyme disease
Chronic conditionOngoing symptoms that follow or are linked to an infection or exposure. Some links are well established, and others are still debated.
What happens
Most adults carry Epstein-Barr virus (EBV), which causes mono and then stays dormant in the body. EBV is a known risk factor for multiple sclerosis and may play a role in lupus, and researchers are studying whether it reactivates in some people with fatigue. Lyme disease is a tick-borne infection treated with antibiotics. Some people have lasting symptoms afterward, which is recognized as post-treatment Lyme disease syndrome. 'Chronic Lyme' with no evidence of ongoing infection is debated, and long antibiotic courses haven't helped in trials. Mold in damp buildings clearly worsens asthma and allergies. Whether it causes a body-wide 'mold illness' is debated, and many mold and toxin tests sold directly aren't validated.
Who gets it
Lyme risk depends on tick exposure in areas such as the Northeast, mid-Atlantic, and upper Midwest. Mold-related symptoms are more likely in people with allergies or asthma who live or work in water-damaged buildings. Women are more likely to have lasting symptoms after several kinds of infection.
Common signs
- Fatigue that doesn't improve with rest
- Brain fog or trouble concentrating
- Joint or muscle aches
- Headaches
- Swollen lymph nodes or a recurring sore throat
- Poor sleep
- Sinus congestion, cough, or wheezing with mold exposure
- A rash, facial droop, or heart palpitations after a tick bite
Labs to ask about
- EBV antibody panel (VCA IgM and IgG, and EBNA) when the timing of infection matters
- Two-tier Lyme blood testing if you've had possible tick exposure
- CBC, metabolic panel, and CRP
- TSH, ferritin, B12, and vitamin D to look for other causes of fatigue
- Allergy testing if mold exposure is a concern
How it's usually treated
- A standard course of antibiotics for confirmed Lyme disease
- Treating symptoms such as sleep problems, pain, and orthostatic intolerance
- Pacing and gradual rebuilding of activity
- Fixing water damage and removing mold, plus allergy and asthma care
Supportive steps to discuss with your provider
- Ask what a test can and can't show before paying for specialty infection or mycotoxin panels.
- Be cautious about long-term antibiotics without clear evidence of infection. They carry real risks.
- Have leaks and damp areas at home repaired by a qualified professional.
- Prevent tick bites with repellent, long sleeves, and daily tick checks.
- Keep a symptom diary to help your provider spot patterns.
See a doctor promptly if you have
- An expanding red rash, fever, or flu-like illness after a tick bite: get same-day care
- Facial droop, fainting, or palpitations after possible tick exposure: get same-day care
- Sharp pain in the upper left abdomen during or after mono: go to the emergency room (possible spleen injury)
- Fever with a stiff neck, severe headache, or confusion: call 911
- Night sweats, unexplained weight loss, or lymph nodes that keep growing
Related conditions
Fatigue and chronic fatigue
Ongoing exhaustion that limits daily life. It can come from a treatable cause, or it can be ME/CFS, a serious illness in which effort makes symptoms worse.
Learn more →Multiple sclerosis
The immune system attacks myelin, the protective coating around nerves in the brain, spinal cord, and optic nerves, disrupting nerve signals.
Learn more →Lupus
A whole-body autoimmune disease that can inflame the skin, joints, kidneys, blood, heart, lungs, and brain.
Learn more →Asthma
Long-term inflammation of the airways that makes them swell, tighten, and fill with mucus in response to triggers, causing wheezing and shortness of breath.
Learn more →
Wondering if your symptoms fit a pattern?
Dr. Lesher is a naturopathic doctor who specializes in women's autoimmune and chronic conditions. Since 2020, she has helped more than 900 patients overcome and heal from their conditions.