When you get bit by a tick, you will typically see a small red bump that may look like a mosquito bite. But three to 30 days later, if a rash shows up and expands from that red area and looks a little like a bull's-eye, that's a sign you may have Lyme disease.  Between 70% and 80% of people with Lyme disease develop this rash, and some patients develop it at more than one location on their bodies.  Left untreated, the infection can spread to the joints, heart and nervous system, according to the Centers for Disease Control and Prevention. This can lead to joint pain and swelling.  After several weeks to months, patients may also experience swelling of the membranes surrounding the brain, temporary paralysis of one side of the face and "brain fog": forgetfulness or confusion.  Removing a tick within 24 hours cuts your risk of developing Lyme disease because it takes time for the bacteria to move from the tick to the host. The longer the tick is attached to the body, the more likely that person will be infected. Use tweezers to carefully and steadily pull the tick off, grasping near its mouth or neck. Then put antiseptic on the infected area.  If you've been bitten and develop symptoms, call your doctor immediately. Even if your symptoms disappear, you should still see a doctor.