Third-stage syphilis is treatable, but typically, it develops two to three years after the initial syphilis infection, making it more severe than both the first and second stages—this is what we refer to as late-stage syphilis. Therefore, treating third-stage syphilis is somewhat more challenging than treating the first and second stages. Additionally, third-stage syphilis particularly tends to cause damage to cardiovascular, neurological, joint, and other organ systems. If it leads to severe complications, it can easily result in deformities, disabilities, or even death. Therefore, it is crucial to be especially vigilant if diagnosed with third-stage syphilis and to seek timely treatment at a hospital.