Saddleback caterpillars are native to many parts of the United States, especially in the East and Southeast. They’re small, usually less than an inch long, and unmistakably colorful. Their bright green bodies, deep brown “saddle” markings, and little horn-like projections make them look harmless, even decorative.
But those cute little spines?
These spines contain a toxin that causes immediate, intense discomfort if they break the skin. While most people recover fully with proper care, the sting can create symptoms that feel alarming:
• A sharp, burning pain
• Redness and swelling
• Tender welts or blisters
• Sensitivity at the sting site for hours
• Headache or nausea in more reactive individuals
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