The healing time for third-stage syphilis varies from person to person. Third-stage syphilis is considered a late stage of the disease, and the situation is very serious for patients who have developed to this stage. Therefore, the duration of illness for most patients is usually very long; it could be several months or even years, which also depends on the patient's level of aggressive treatment and their own immune resistance. Additionally, it is necessary to consider complications of third-stage syphilis. If there are severe complications involving cardiovascular and nervous systems, or joint damage, recovery can be very prolonged and difficult.