tick bites how long do they last
Erythema migrans (EM) rash: Occurs in approximately 70 to 80 percent of infected persons. Begins at the site of a tick bite after a delay of 3 to 30 days (average is about 7 days) Expands gradually over a period of days reaching up to 12 inches or more (30 cm) across. May feel warm to the touch but is rarely itchy or painful. Sometimes clears as it enlarges, resulting in a target or âbullâs-eyeâ appearance.