👉 A leechkin is a type of infection that can occur in the skin or mucous membranes. It occurs when an insect or other arthropod bites your skin, causing it to become inflamed and red. The infection can also spread through the bloodstream, leading to symptoms such as fever, chills, and muscle pain. The symptoms may vary depending on the stage of the infection, but they usually include a rash that appears all over the body, swelling, and difficulty breathing or swallowing.