Teething is a physiological process that may be marked by local regional or general physiopathologies. We have studied these disorders in a sample of 499 children whom we followed from the age of 5 until the age of 30 months. The study consisted in a clinical endobuccal examination. Each month we recorded the order and the eruption date of the tooth or teeth and the disturbances that arise during the process or after, if any. We expose the results of this study in this paper. We collected local and general disturbances during the primary teeth eruption period. We considered that in certain conditions these disturbances could be to the eruption process. Teething is certainly a natural process, however considering its traumatic impact on the young child, we should not reject the aetiology in the justification of the disturbances observed in this process and seek another one which might not be valid.