This bacterial infection hits fewer than 3,000 people a year -- and if it’s not found early, it can cause serious illness and long-term health problems. Symptoms usually show up 2 days to 2 weeks after a tick bite. It causes fever, headaches, vomiting, stomach pain, red eyes, and sore muscles. Most people also get a red splotchy rash that starts on their ankles or wrists. It usually shows up several days after other symptoms.