Short Answer
They can connect when chewing side, sleep posture, posture imbalance, or one-sided muscle tension repeats.
How to think about it
The jaw moves on both sides, but load can build more on one side. One-sided chewing or repeatedly raising one shoulder may make jaw, neck, and shoulder tension more noticeable on one side.
Evidence and limits for this question
What this question checks
This page uses the question "One shoulder keeps tightening and one side of my jaw feels uncomfortable. Can they connect?" to organize a symptom pattern before assuming a TMJ-related cause.
What to rule out first
Urgent, organ-specific, dental, ENT, neurologic, traumatic, infectious, or breathing-related warning signs should be considered before jaw-related interpretation.
What is reviewed in clinic
Consultation details, symptom timing, jaw movement, chewing muscle tension, bite changes, previous exam results, and recurrence patterns may be reviewed together.
What not to decide from this page
Do not use this page alone to choose a diagnosis, appliance, procedure, medication, or emergency response.
Safety note
One-sided shoulder pain with arm numbness, sensory change, or weakness should be evaluated for cervical spine or shoulder joint causes first.