Symptoms of bed bug bites will mainly manifest as redness, swelling, itching and pain at the site of the bite, and if combined with localized bacterial infections, white pustules may appear at the site of the bite, and a small amount of pus will flow out after the pustules rupture. In addition, if the human body is sensitive to the toxins or secretions of the insects, in addition to local symptoms, the symptoms may spread to the whole body, resulting in maculopapular rash or hives, these rashes are mainly itchy, and may be accompanied by generalized numbness, or dizziness, nausea, or immobility of the hands and feet and other neurological symptoms.