Should it take more than 18 months to have a revision done on a rhinoplasty? ...
There is no specialty called revision rhinoplasty.
A Board Certified Plastic Surgeon with experience in rhinoplasty will be able to discuss your concerns and expectations and what can be realistically achieved.
You should absolutely seek a surgeon experienced in secondary rhinoplasty. You should see examples of treated patients who had your problem and should feel comfortable with the surgeon.
Timing depends on the problem and the number of priors. One year may be enough for many patients, but some require longer. It is important to let the tissues recover so that all problems can be identified and successfully teated.
Revision Rhinoplasty – The timing of revisional rhinoplasty varies from 1-2 years depending on the complexity, if the patient has had previous surgery, if the patient has thick skin, an Ethnic nose, or a male then it may take significantly longer. It should definitely be done by a Board Certified Plastic Surgeon or ENT with expertise in revisional rhinoplasty as this is the most complicated and difficult procedure that we do in plastic surgery.