Whether or not an olfactory disorder can be self-healed depends on the type of disease causing it and the lesions of the mucosa, nerves, and centers that produce the sense of smell. If the disease is congenital olfactory disorder, such as congenital underdevelopment of the olfactory mucosa, olfactory nerve or defects, and cannot feel the stimulation of olfactory pigment, it is generally not self-healing. If the respiratory airflow is obstructed by nasal diseases, the olfactory sensitivity is reduced because the olfactory mucosa cannot reach the olfactory mucosa, but the olfactory mucosa, olfactory nerve and olfactory center are not diseased, the olfactory dysfunction may be restored. For example, in chronic sinusitis, temporary olfactory dysfunction occurs, and the sense of smell can be often restored after treatment. If the olfactory dysfunction is caused by lesions in the olfactory mucosa and olfactory nerve endings, such as atrophic rhinitis, the olfactory mucosa atrophies, and the loss of smell may occur, and it may be difficult to recover from the treatment of the olfactory dysfunction. It is recommended to actively treat the primary disease when there is an underlying disease with olfactory dysfunction in order to promote the recovery of the sense of smell. Patients who develop olfactory dysfunction should actively seek medical attention to clarify the diagnosis and standardize medication and treatment under medical advice.