Providing you have had well-performed facelifts and you are healthy, there is no limit to the number of revisions you can have. Plastic surgery is based on need and viability, not an arbitrary number. Even after a full rhytidectomy, in which the SMAS layer is lifted upward and outward, your face will continue to age and lose volume. Many people opt for a second facelift after 10 years to continue their rejuvenation. Fat grafting during a facelift helps to make the results look more natural. You can also opt for a mini lift or use facial fillers, such as Juvederm Voluma, to maintain facial volume between lifts. Generally, it would be unusual for a patient to require more than 3 facelifts over a lifetime. I hope this helps.