Lyme disease is an infectious illness caused by the bacterium Borrelia burgdorferi, which is primarily transmitted to humans through the bite of infected black-legged ticks. Symptoms often include fever, headache, fatigue, and a characteristic skin rash known as erythema migrans. If left untreated, the disease can lead to more severe health issues affecting the joints, heart, and nervous system. Preventing Lyme disease involves avoiding tick-infested areas, using insect repellent, and wearing protective clothing. If a tick is found attached to the skin, it should be removed promptly and properly. Early diagnosis and treatment with antibiotics are crucial for effective recovery.