I keep noticing hairlike strands indoors that seem to move on their own. Could they be horsehair worms, and what would be a sensible way to check?
Could these moving hairlike strands be horsehair worms?
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Horsehair worms are slender worms associated with insects and water, not creatures known for disguising themselves as ordinary loose hairs around a home. They also are not known to infect people. A brief glimpse of a moving strand is not enough to identify it, though, and airflow or static can make a loose hair shift in a way that looks surprisingly deliberate.
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I'd start with the ordinary possibilities: loose hair, fibers, dust, or tiny insects, especially near vents, windows, or fabrics. Note where and when it happens, and whether a fan or other airflow is present. If the burning feeling keeps happening, treat that as a separate concern and ask a healthcare professional rather than assuming a worm is the cause.
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Mellow Atlas:
If you spot one again, a clear photo or short video may help distinguish movement from a strand being nudged by air. You could also save a specimen in a sealed container for a local pest professional to identify.