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 …

The following is a list of all of the major tick-borne diseases, the usual tick vector (s) or common ticks, and the pathogen (s) of the tick species that, if known, transmits them in the United States.

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.

Nov 14, 2023 · Most tick bites are painless or cause only minor symptoms, such as a change in skin color. But the bite from some ticks can be serious. In the United States, the number of …

Jul 24, 2025 · In this article, we help you identify ticks and tick bites, along with the symptoms of tick-borne illnesses, and learn what to do if a tick bites you.

Ticks are most active in spring, summer and fall. They can be found in cooler areas where trees, brush, leaf litter and tall grasses provide cover and shade from the sun. Ticks avoid heat and …

Jun 23, 2025 · The risks of getting a tick-borne disease like Lyme or relapsing fever vary by region, depending on what ticks are around, what they're carrying, and how likely they are to …

Nov 24, 2025 · A tick is any of about 970 species of parasitic invertebrates in the order Ixodida. Ticks are important parasites of large wild and domestic animals and are also significant …

Oct 13, 2024 · It spreads from the bite of a dog tick, wood tick, or lone star tick in many parts of the country. The most common symptoms are a high fever, swollen glands, sore throat, and …

Dec 2, 2025 · Identifying a tick bite lets you to watch for signs of infection and decide when to seek medical care. Learn to recognize tick bites and signs of Lyme disease.