May Be Caused by

 Common

Cricopharyngeal muscle

Lymph node enlargement

Osteophyte of cervical spine

Pharyngeal venous plexus

Retrolaryngeal abscess

Retrolaryngeal hematoma

Thyroid mass

 Uncommon

Brachiocephalic artery aneurysm

Buckling of brachiocephalic artery

Buckling of carotid artery

Carotid artery aneurysm

Ectopic gastric mucosa

Laryngeal neoplasm

Tracheal neoplasm