Yes: The sternocleidomastoid (SCM) muscle inserts into the sternoclavicular area and then runs up into an insertion directly into the mastoid process Thus, if the SCM muscle is in spasm or tight, it will pull on the mastoid process likely causing inflammation and swelling. The masseter muscle in your cheek is also connected to the mastoid process, and, could tighten w/ hyperspasmodic activity in former
Answered 6/10/2017
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