Thyroid hormones play an important role in the regulation of physiologic processes. Thyroid dysfunction is the second most common glandular disorder of the endocrine system and is increasing predominantly among women. Thyroid disease can lead to imbalance in the homeostasis of the body and affect the healing capacity of tissues. The oral cavity is adversely affected by either an excess or deficiency of these hormones. This case report presents the influence of thyroid hormone dysfunction and its impact on periodontal disease progression, systemic health of the patient, and the management of periodontal disease. The report emphasizes the need for frequent professional evaluations, patient education, and consistent educational reinforcement by health care providers in patients with hypothyroidism. Thus, this case report determines the relationship between thyroid hormone imbalance and periodontal health.