A loose rotten root will not fall out on its own because the root cannot fall out on its own in the socket and needs to be extracted at the dentist’s office.
When tooth decay occurs, along with the longer the crown decay will be deeper and deeper, until the tooth only a rotten root exists in the gums. The root of the tooth cannot fall off by itself, it is in the alveolar socket and needs to be extracted with the help of external force. If not extracted in time, it will lead to the elongation of the teeth in the opposite jaw or the inflammation of the root of the tooth leading to pain, which will affect eating.
When you find tooth decay, you should go to the dental clinic in time for treatment. Otherwise, when the tooth is decayed to the point that only the root is left, it needs to be extracted, and after extraction, it should be restored in time to maintain the gap and normal bite function.