TPO and chronic idiopathic urticaria: A significant correlation has been established between autoimmune thyroid disorders and chronic spontaneous urticaria, necessitating the evaluation of triiodothyronine (T3), tetraiodothyronine (T4), thyroid-stimulating hormone (TSH), and anti-thyroid peroxidase (anti-TPO) antibody levels in patients with chronic spontaneous urticaria.