Short Answer
Night load may be only one part of the problem. Daytime posture, clenching, chewing load, and muscle sensitivity may remain.
How to think about it
A mouthguard can reduce some nighttime tooth contact, but it does not automatically resolve daytime habits, posture, chewing load, stress response, or all muscle pain patterns.
Evidence and limits for this question
What this question checks
This page uses the question "A mouthguard helps at night, but daytime pain remains. What does that mean?" 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
If the mouthguard changes your bite, worsens pain, causes new tooth pain, or does not fit, it should be reviewed by a clinician.