Adults use pacifiers for a surprisingly wide range of reasons, from managing anxiety and stress to coping with past trauma, and in some clinical settings, to calm agitation in patients with dementia. While it might seem unusual, the act of sucking is hardwired into the human nervous system from birth, and those calming effects don’t simply disappear with age.
The Biology Behind Why Sucking Is Calming
Non-nutritive sucking, the kind that doesn’t involve food, activates a complex network of nerves that extends well beyond the mouth. Five of the twelve cranial nerves are involved, including the vagus nerve, which plays a central role in shifting the body from a stressed “fight or flight” state into a calmer “rest and digest” mode. When you suck on something, even without swallowing food, your body still triggers some of the same homeostatic responses it would during feeding, including signals related to digestion and appetite regulation. This is why babies calm down with a pacifier even when they aren’t hungry, and why the same basic mechanism still works in an adult body.
The repetitive, rhythmic motion also provides a form of sensory input that many people find grounding. It occupies the mouth and jaw in a way that can interrupt cycles of teeth grinding, jaw clenching, or anxious fidgeting. For people who already bite their nails, chew pen caps, or clench their jaw under stress, a pacifier is doing essentially the same job through a different object.
Age Regression as a Coping Tool
One of the most common reasons adults deliberately use pacifiers is voluntary age regression. This is a coping strategy where a person temporarily adopts childlike behaviors to manage stress, anxiety, depression, or the effects of past trauma. Sucking on a pacifier, creating a safe space with comforting objects, or engaging in other childlike activities can help a person feel more at peace during overwhelming moments.
Regression itself is a well-recognized psychological phenomenon. In children, it’s considered a normal and temporary response to stress. In adults, it can serve a similar function. Some people use it intentionally as part of a broader self-soothing routine, while others find themselves drawn to it without fully understanding why at first. For those with a history of childhood trauma, returning to behaviors associated with safety and comfort can create a sense of security that’s difficult to access through other means.
This practice overlaps with several online communities where adults openly discuss using pacifiers, stuffed animals, and other comfort objects. For many in these spaces, the pacifier isn’t symbolic or performative. It’s a functional tool that helps regulate their emotional state, particularly during anxiety spikes or before sleep.
Clinical Uses in Dementia Care
In geriatric care settings, oral stimulation has been used to manage agitation in patients with dementia. Vocally disruptive behavior, including repetitive shouting or moaning, is a common and distressing symptom, particularly in frontotemporal dementia. Case studies have documented that providing oral objects like lollipops can significantly reduce this kind of agitation. One published case involved a 63-year-old patient on a young onset dementia unit whose disruptive vocalizations responded well to this simple intervention.
The underlying theory is similar to the self-soothing mechanism in healthy adults. The rhythmic oral activity engages the same cranial nerve pathways, providing calming sensory input when a patient can no longer use language or cognitive strategies to self-regulate. While pacifiers specifically are less commonly documented in clinical literature than other oral interventions, the principle is the same.
Sensory and Sleep-Related Reasons
Some adults use pacifiers specifically to help with sleep. The repetitive sucking motion can serve as a form of self-soothing that slows breathing and promotes relaxation, much like other bedtime rituals. People who grind their teeth at night sometimes find that a pacifier offers an alternative oral activity, though it isn’t a clinical substitute for a dental night guard.
Adults with sensory processing differences, including those on the autism spectrum, may also use pacifiers or similar oral stimulation tools as part of their sensory regulation. Chewing and sucking provide proprioceptive input to the jaw that can help manage sensory overload. Commercially available “chew jewelry” and silicone chew tools serve the same purpose in a more socially neutral form, but some people prefer a pacifier because the sucking motion is more calming than chewing alone.
How It Compares to Thumb Sucking
Adults who suck their thumbs and adults who use pacifiers are tapping into the same neurological mechanism, but the physical consequences differ. Prolonged thumb sucking can cause blisters, calluses from thickened skin, and even nail deformities or infections around the nail bed. If sustained over long periods, it can also affect dental alignment, pushing upper front teeth forward and lower front teeth inward, potentially creating an open bite where the front teeth no longer meet.
A pacifier distributes pressure more evenly and doesn’t create the same concentrated force on specific teeth, though heavy, prolonged use can still affect dental alignment over time. From a hygiene standpoint, a pacifier can be cleaned and replaced, while a thumb carries whatever bacteria it has contacted throughout the day. For adults who already have a sucking habit, switching from thumb to pacifier generally reduces the risk of skin damage and infection.
Social Stigma and Practical Realities
The biggest barrier for most adults who use pacifiers isn’t health risk. It’s social perception. Many people use them only in private, during sleep, or within specific communities where the practice is normalized. The stigma can make it difficult for people to discuss the habit with healthcare providers, which sometimes means missing out on support for the underlying anxiety or trauma that drives the behavior.
There’s nothing inherently harmful about an adult using a pacifier. The main physical considerations are dental: any sustained pressure on teeth can gradually shift alignment, so people who use a pacifier for hours daily should be aware of this possibility. Keeping the pacifier clean is straightforward, and adult-sized versions are available that fit the mouth more comfortably than infant models. For most people, the practice is a low-risk self-soothing behavior that fills the same role as other common habits like fidgeting, nail biting, or chewing gum.