Sternocleidomastoid Pain When the SCM is strained or shortened the muscle itself rarely hurts, no matter how stiff or tight it may be. Problems are referred elsewhere, to head and neck, ears, eyes, nose and throat.... Sternal Division (left): Head pain, "sinus" pain, visual disturbances, “sore throat,” difficulty swallowing, dry cough. Clavicular Division (right): Autonomic and proprioceptive disturbances; frontal "sinus" headache...
