Can narcolepsy be triggered by infections like strep throat?

Reviewed by Yoshinori Abe, MD

Internal Medicine

Research suggests a possible link between certain infections, such as strep throat, and the onset of narcolepsy. Scientists believe these infections may trigger an autoimmune response that damages brain cells responsible for regulating sleep-wake cycles. However, this connection is not fully understood, and more research is needed to confirm how infections contribute to narcolepsy development.

If you're experiencing symptoms like excessive daytime sleepiness, sudden muscle weakness, or unexplained fatigue, understanding the cause is the first step toward relief. Take a free, instant online symptom check to get personalized insights and clear guidance on your next steps—no appointment needed.

Reviewed for medical accuracy: 07/14/2026

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Discover if infections could trigger narcolepsy See if your symptoms fit narcolepsy Find out what’s causing daytime sleepiness Learn OTC options for sleepiness relief Find a narcolepsy specialist near you Understand safe home remedies for fatigue Check if narcolepsy needs care today

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Explanation

Narcolepsy is a sleep disorder where people suddenly feel very sleepy or fall asleep. Some researchers have looked into whether infections, like strep throat, might trigger narcolepsy.

Streptococcal Infection: One study suggests that there might be a connection between strep infections and narcolepsy. They found that some people with narcolepsy had high levels of antibodies against strep bacteria.
Antibody Levels: Another study found that people with narcolepsy often had higher levels of antibodies against strep, which could mean their bodies were reacting strongly to the infection.
Ongoing Research: However, the research is not complete, and scientists are still working to understand how these infections might cause narcolepsy. It's important to know that not everyone who gets a strep infection will develop narcolepsy.

If you're experiencing unusual sleep patterns or sudden sleepiness, you can check your symptoms with a free AI symptom checker. For mental health support, please visit 988lifeline.org.

(References)

Natarajan N, Jain SV, Chaudhry H, Hallinan BE, & Simakajornboon N. (2013). Narcolepsy-cataplexy: is streptococcal infection a trigger?. Journal of clinical sleep medicine : JCSM : official publication of the American Academy of Sleep Medicine, 23493659.
Aran A, Lin L, Nevsimalova S, Plazzi G, Hong SC, Weiner K, et al. (2009). Elevated anti-streptococcal antibodies in patients with .... Sleep, 19725248.
Dye TJ, & Simakajornboon N. (2022). Sleep disorders in children, A rapidly evolving field seeking .... Pediatric pulmonology, 34021733.

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