Lyme disease is caused by a bite from a black-legged tick. If you are bitten by this tick and develop Lyme disease, you may see a bull's-eye rash. It's a common sign of Lyme disease, but it's not the only sign.What are the long term effects of untreated Lyme disease?
Consult your doctor even if signs and symptoms disappear — the absence of symptoms doesn't mean the disease is gone. Untreated, Lyme disease can spread to other parts of your body for several months to years after infection, causing arthritis and nervous system problems.What are the problems with Lyme disease?
Lyme disease also can affect the heart. The most common problem is a very slow heartbeat that leads to fatigue, dizziness and fainting. The heart muscle can also be inflamed, called myocarditis. Lyme disease also can cause pain and swelling of joints.What happens if you get Lyme disease?
Untreated, Lyme disease can spread to other parts of your body for several months to years after infection, causing arthritis and nervous system problems. Ticks can also transmit other illnesses, such as babesiosis and Colorado tick fever. The deer tick (Ixodes scapularis) goes through three life stages.