Rocky Mountain Spotted Fever (RMSF) is a bacterial infection caused by the Rickettsia rickettsii bacterium, which is transmitted to humans through the bite of infected ticks. Common symptoms include fever, headache, and a characteristic rash that often appears a few days after the onset of fever. If left untreated, RMSF can lead to serious complications, including organ failure and death. Early diagnosis and treatment with antibiotics, such as doxycycline, are crucial for recovery. Preventive measures include avoiding tick-infested areas and using insect repellent to reduce the risk of bites.