Even though the Kamitetep is small, it can cause bruising and itching when it touches your skin. These strange-looking, tiny caterpillars often stick to walls or furniture inside homes — chances are, you’ve seen them before without even realizing what they are.

Many people don’t know that this is actually a type of caterpillar that can cause red bumps, bruises, and itching. The species, Phereoeca uterella, can leave behind tiny hair-like strands when it bites, and these hairs — as thin as a needle — can irritate your skin.

According to Wikipedia, Phereoeca uterella is a species of moth better known as the plaster bagworm or household casebearer. It’s common in warm, humid areas, especially in homes across the southern United States.

The effects of their stings or bites can last for weeks. They often leave their hairs in the skin, which can cause swelling, pain, and intense itching. If you’ve been affected, an anti-itch cream or ointment can help relieve the discomfort.