If your dentist says there are strong reasons to remove wisdom teeth you should better agree to that. Actually there is no strict limit as for the time of removal of wisdom teeth. However, most dentists claim that the earlier you do it the better. This way the risk of complications is decreased.
The best age to remove wisdom teeth is early youth or late adolescence. Then wisdom teeth do not have roots and the bone around the tooth is not so dense so it will be easier to remove it. Older people will feel much discomfort because of such procedure. Moreover, heeling will take more time. Some investigations show that even people a bit on the right side of thirty are likely to have serious complications caused by removal of wisdom teeth. Mind that if wisdom teeth are your constant source of pain or discomfort it is better to remove them as soon as possible.