Learn where ticks live, how to prevent tick bites, and what to do after a tick bite. Homepage for CDC's website about ticks and tickborne diseases.

Jul 24, 2025 · Ticks can transmit diseases like Lyme disease, Rocky Mountain spotted fever, and Colorado tick fever, so prompt removal and medical attention are crucial. To remove a tick, …

Ticks are external parasites, living by feeding on the blood of mammals, birds, and sometimes reptiles and amphibians. The timing of the origin of ticks is uncertain, though the oldest known …

There are over 800 species of ticks throughout the world, but only two families of ticks, Ixodidae (hard ticks) and Argasidae (soft ticks), are known to transmit diseases or illness to humans.

Nov 14, 2023 · As of 2019, Lyme disease is the most often diagnosed tick-borne illness. Here are images of unfed, human-biting ticks. The images also show where the ticks might be found in …

5 days ago · Deep in their bellies, ticks carry diseases like Lyme Disease, ehrlichiosis, and Rocky Spotted Mountain Fever.

4 days ago · A tick bite can cause immediate and intense itching in some people due to the toxins and irritants in the tick’s saliva. Here’s how to identify a tick bite.

Jun 23, 2025 · Ticks can carry more than a dozen different disease-causing agents, including toxins, allergens, bacteria, parasites and viruses. There are early signs that it could be a bad …

Jul 18, 2025 · What Are Ticks? Ticks are small bloodsucking parasites. Although people assume ticks are insects, they are actually arachnids (like spiders) with three pairs of legs and one pair …

Oct 13, 2024 · Ticks are parasites that feed on blood and can transmit serious diseases like Lyme disease and Rocky Mountain spotted fever, causing symptoms ranging from fever to severe …