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5. Causes

Experts do not understand the exact mechanisms that cause symptomatic Demodex infestations. Some research suggests that the mites physically block the hair follicle or carry disease-causing bacteria. Alternatively, as they die, the mite bodies may trigger a hypersensitiveve response or innate immune response. It is also unclear if the mites themselves trigger symptoms, or if the mites simply prefer skin that is experiencing issues like rosacea.

microscope slide mite sample nicolas_ / Getty Images

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