Core Viewpoint - The recent surge in cases of dermatitis caused by the "toxic hidden-winged beetle" has raised public concern, particularly in Jinan, Shandong, where many individuals have suffered severe skin reactions from contact with the insect [1][3]. Summary by Sections Overview of the Toxic Hidden-Winged Beetle - The hidden-winged beetle, known for its potential to cause severe skin reactions, belongs to the order Coleoptera and the family Dermestidae, with a body length typically ranging from 5 to 10 millimeters [1]. - There are over 66,000 known species of hidden-winged beetles globally, with about 20 species posing a threat to humans; in China, only two to three species are commonly found, with the most prevalent being the toxic hidden-winged beetle [1]. Health Risks and Symptoms - The toxic hidden-winged beetle contains a strong acidic toxin known as "toxic hidden-winged beetle toxin," which can cause dermatitis upon skin contact, leading to symptoms such as itching, burning sensations, and the formation of red spots, blisters, or pus-filled lesions [3][4]. - A notable case involved an individual who, after swatting a hidden-winged beetle on their neck, inadvertently transferred the toxin to their eyes, resulting in severe skin damage [4]. Prevention and Correct Response - To avoid contact with the toxic hidden-winged beetle, individuals should refrain from swatting at the insect; instead, gently blowing or flicking it away is recommended [6]. - Preventive measures include wearing long sleeves, long pants, and closed shoes when outdoors, especially during the summer and autumn months when the beetles are most active [6]. - The beetles are attracted to light, so it is advisable to keep doors and windows closed at night and avoid areas with bright lights when outdoors [6]. First Aid and Treatment - In the event of contact with the toxin, immediate washing with soap and water is crucial to minimize skin damage; if the toxin is near the eyes, rinsing with clean water is recommended [8]. - It is advised not to apply alcohol, iodine, toothpaste, or other home remedies to the affected area, and individuals should avoid scratching to prevent secondary infections [8].