By Christina Mathieson, LMFT #115093, founder of My Mental Climb.
The word "glimmer" has shown up everywhere on TikTok in the last year or two, usually in videos labeling small pleasant moments as evidence that someone is "regulating their nervous system." These examples include drinking a latte, sun on a windowsill, a dog wagging its tail. The framing is sweet, but it isn't really what the term means clinically, and the misuse can leave people feeling like they have failed at something they did not actually need to be doing.
Where the term comes from
The term "glimmer" was introduced by Deb Dana, a clinical social worker and one of the leading translators of Stephen Porges's polyvagal theory into therapy practice. Dana defined glimmers as micro-moments of cues that the autonomic nervous system reads as safe or connecting. They are the autonomic counterpart to triggers, but they are not simply "good vibes." A glimmer is a specific kind of cue: something the body perceives as safe enough that the ventral vagal branch of the parasympathetic nervous system activates, even briefly.
What that actually does in the body
The polyvagal model maps three states the autonomic nervous system can be in. Dorsal vagal shutdown is the freeze state, this is when the body is conserving energy under threat. Sympathetic activation is the fight or flight state. When someone is in the social engagement state, the ventral vagal is activated. This is where the body feels safe enough to connect, rest, and digest.
Triggers move the body toward sympathetic or dorsal states. Glimmers move the body toward ventral vagal. The reason that matters is that trauma keeps the nervous system stuck in chronic activation or shutdown, and the body needs repeated experiences of safety to learn to settle. A glimmer is one of those experiences, not because it is pleasant, but because the body has registered it as safe.
Where TikTok gets it wrong
Most of the glimmer content circulating online treats glimmers as moments of joy you should be cataloging, that isn't quite right. A glimmer is a signal of safety, not a signal of happiness. This doesn't mean that some glimmers can't be joyful. Others are quiet, almost unremarkable such as a familiar smell, the cadence of a friend's voice on a phone call, and eye contact with your dog. The body does not need the moment to be exciting for the ventral vagal branch to register it.
The other common error is treating glimmers as a self-help tool that should fix your trauma. They do not fix anything by themselves. Glimmers are part of how the nervous system rebuilds capacity for safety, and that rebuilding takes repetition over time, often in the context of actual trauma processing. If you have experienced significant trauma, noticing glimmers without doing the deeper work is unlikely to change much.
Why noticing them still matters
What glimmers can do is widen the window of what your body recognizes as safe. For people whose nervous systems have been stuck in vigilance, even a few seconds of ventral vagal activation can be informative. The body learns that this state is possible. Over time, especially when paired with trauma-informed therapy, that capacity expands.
The way to notice glimmers is not to perform them or look for them on social media. It is to slow down enough to observe what the body is doing when something good is happening such as the smell of coffee, the sound of rain, and a specific person walking into a room. Your job is not to manufacture more of these moments. Your job is to notice when one is already happening, and to let the body register it for a few seconds longer than it usually would.
Where glimmers fit in trauma work
In trauma treatment, glimmers are usually one piece of a larger framework that includes nervous system mapping, stabilization, and processing modalities like EMDR or somatic experiencing. Trauma therapy is not about cataloging good moments, it is about reorganizing the way the nervous system has learned to respond. This work requires both the slow work of building safety and the more demanding work of processing the original injuries. Glimmers help the first part of that work but they are not a substitute for the second.
If you find yourself trying to use glimmers as a shortcut around the harder work, that itself is a signal. The body is asking for support that goes beyond observation.
When to reach out
If you have a trauma history and you are realizing your nervous system stays in chronic activation or shutdown, that is the kind of pattern that benefits from trauma-informed therapy rather than self-tracking apps or social media. On our team, the clinician I would point you to first is Jalyse Stewart, AMFT #153712, supervised by me (Christina Mathieson, LMFT #115093) at My Mental Climb. Her primary focus is trauma therapy and her training spans EMDR and somatic practices, which is the combination that actually shifts these patterns. A free 15-minute consult is a no-pressure place to start.
Further reading: Rhythm of Regulation — Deb Dana · Polyvagal Institute · EMDRIA — About EMDR Therapy · Stephen Porges
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Last clinically reviewed: by Christina Mathieson, LMFT #115093.
