Yes, and as soon as possible! While an early decayed tooth may not be giving you much trouble yet, do not be tempted to put off getting your filling done as tooth decay does not repair itself and can quickly become a much more complex and costly problem to fix! If left untreated, a small hole in your tooth can quickly grow and eventually cause the nerves in the dental pulp to get inflammed, causing intensified pain. Once this happens, your condition may require a root canal or extraction.