What Is a Tussock Moth Caterpillar Rash
A tussock moth caterpillar rash is an itchy skin reaction caused by contact with tiny, barbed hairs on the body of certain tussock moth caterpillars. These hairs can break off, embed in skin, and trigger irritation, redness, and small raised bumps or blisters.
Common Symptoms and Immediate Response
Symptoms often include localized itching, redness, swelling, and a rash that may appear in lines or clusters matching the contact area. Some people also experience a stinging or burning sensation shortly after touching the caterpillar. If exposed, avoid rubbing the area, gently remove any visible hairs with tape, and wash the skin with soap and water.
Treatment and When to Seek Medical Help
Mild cases can be managed with cool compresses, over-the-counter antihistamines, and hydrocortisone cream to reduce itching and inflammation. Do not scratch, as this can worsen irritation or introduce infection. If the rash spreads, persists, or is accompanied by difficulty breathing or swelling, seek medical attention promptly. For more detailed guidance on plant and insect-related rashes, consult the American Academy of Dermatology at rash treatment.
