It is possible for tonsils to partially grow back. During a tonsillectomy, most of the tonsils are removed. However, some tissue often remains, so tonsils occasionally can regenerate (regrow) — although they probably won't grow back completely or to their original size.

How rare is it for tonsils to grow back?

Tonsil regrowth is relatively uncommon, but some research shows you might be more likely to experience this phenomenon if: Your tonsils were removed at a very young age. You had a tonsillotomy instead of a standard tonsillectomy.

How long until tonsils grow back?

However, this isn't a common occurrence. There are certain factors that may make your tonsils more likely to grow back, such as if they are removed before they normally would have stopped growing. Under normal circumstances, tonsils and adenoids tend to grow at a fairly steady rate until you are about 8 years old.