Medical Articles
That Pesky Black-and-Orange Striped Bug: The “Burn Bug”
09.08.2026
Have you ever woken up in the morning to find your skin red, swollen, and accompanied by itching or sharp pain? The culprit might just be the “burn bug.”
The official Japanese name for this insect is “Aobaarigatahaneakushi,” but it is globally recognized as the rove beetle (commonly known as the “burn bug” or “tomcat”). Adult beetles are about 6–7 mm long and are easily characterized by a black head and an orange-and-black striped body. They tend to thrive in rice paddies, wetlands, and poorly drained construction sites. In Malaysia, however, they are frequently found even in urban areas—including relatively high-rise condominiums!—where they are drawn to residential lights and fly indoors. These beetles contain a highly toxic substance called “pederin” within their bodies. When their bodily fluids come into contact with a person’s neck, arms, or face, they trigger severe skin irritation. True to its nickname, this troublesome insect causes linear dermatitis, resulting in burn-like symptoms such as blisters and painful hives. If you spot one, you must never crush or touch it directly with your bare hands. If it happens to land on your skin, gently blow it off or rinse the area immediately with water. If inflammation develops, be sure to consult a dermatologist as soon as possible, even if the symptoms appear mild.
Many of our patients are completely unaware of when they actually came into contact with this insect. We frequently see cases where the beetle crawled onto their face or body while they were asleep without them realizing it, only for them to notice the painful streaks the next morning. If you rub your face or eyes with hands that have touched the beetle's bodily fluids, the inflammation will quickly spread. In particular, rubbing or scratching around the eyes can cause severe conjunctivitis, and in extreme cases, may rarely lead to visual impairment. If you notice any abnormalities in your eyes, please seek an immediate examination from an ophthalmologist.
Although small, rove beetles are dangerous pests that carry toxins harmful to humans. Why not take this opportunity to share this vital information with your entire family to ensure everyone stays safe?
Author Bio
Dr. Vivien
Medical Director/Family Medicine Specialist
After completing medical school in Moscow, Dr. Vivien gained clinical experience at a general hospital in Penang, Malaysia. She later served as a full-time physician at Batu Gajah Hospital in Perak and at a clinic in Selangor.
Since 2018, she has been with Hibari Clinic, where she currently serves as Medical Director and is dedicated to providing care for the local community. She has a strong interest in pediatrics and psychosomatic medicine, and values patient-centered care that respects each individual’s needs.