Touch is one of the oldest forms of therapy. Today, neuroscience is beginning to explain why these simple human actions can have such powerful effects.

At the centre of this story is oxytocin, often called the “bonding hormone.” But oxytocin is much more than a hormone linked to birth and breastfeeding. It is part of a wider body–brain system that helps regulate social connection, stress, pain, digestion, growth, and healing. Many forms of manual therapy, bodywork, massage, infant care, and trauma-informed practice may work partly by activating this calm-and-connection system.

Oxytocin is not just about motherhood

Oxytocin was first known for its role in uterine contractions during labour and milk release during breastfeeding. However, we now know that oxytocin is active in men and women, infants and adults, young people and older people. It is produced in the hypothalamus and released both into the bloodstream and within the brain.

This distinction matters. Oxytocin measured in blood does not always tell us what is happening in the brain. A therapy may produce calming, social, or pain-reducing effects through central oxytocin pathways even if blood oxytocin levels do not clearly rise. This is one reason why clinical studies sometimes find beneficial effects of touch without consistent changes in circulating oxytocin.

Oxytocin acts on many areas involved in emotion, stress, pain, reward, autonomic regulation, and social behaviour. These include the amygdala, prefrontal cortex, brainstem, spinal cord, vagal pathways, and areas involved in reward and motivation. In simple terms, oxytocin helps shift the body away from threat and toward safety, contact, repair, and recovery.

The calm-and-connection system

A review article in Frontiers in Psychology describes oxytocin as a key part of the “calm and connection system.” This system is almost the opposite of the fight-or-flight response.

When the stress system is dominant, the body prepares for danger. Heart rate and blood pressure may rise, cortisol increases, muscles tense, pain sensitivity may change, and attention narrows toward threat. This is useful in emergencies, but harmful when prolonged.

When the oxytocin-linked calm-and-connection system is active, the body moves into a more restorative state. Social engagement becomes easier. Fear and anxiety decrease. Parasympathetic or vagal activity increases. Digestion, tissue repair, growth, bonding, and recovery are supported. Pain and inflammation may be reduced.

For therapists, this provides a useful framework: good therapeutic touch is not simply mechanical. It may also be neurobiological. The therapist is not only moving tissue, mobilising joints, or applying pressure. They may also be helping the nervous system move toward safety.

Different kinds of touch may have different effects

Not all touch is the same. The text makes an important distinction between gentle touch and firmer touch.

Gentle, pleasant stroking of the skin appears to activate specialised sensory fibres, often called C-tactile or CT fibres. These fibres respond especially well to slow, light stroking, often around the speed of a gentle caress. This kind of touch is associated with pleasantness, emotional regulation, wellbeing, and social approach.

In practical terms, gentle touch may help a person feel safe enough to connect. It may reduce anxiety, improve trust, and support emotional openness. This may be particularly relevant in infant care, trauma-informed therapy, palliative care, mental health settings, and any situation where the patient’s nervous system is guarded or hypervigilant.

Firmer touch seems to activate different sensory pathways, including deeper mechanoreceptors. This may produce stronger calming, pain-reducing, and stress-reducing effects. Holding, sustained pressure, massage-like stroking, and deeper manual contact may therefore be more closely linked with sedation, reduced cortisol, lower blood pressure, improved vagal tone, and pain modulation.

This does not mean one form of touch is better than another. Rather, different touch qualities may have different therapeutic purposes. Gentle touch may invite connection. Firmer, safe, sustained touch may deepen calm.

Why safety and familiarity matter

Oxytocin is not simply released whenever someone is touched. Context matters.

Touch that feels safe, respectful, familiar, and welcome is more likely to support calm and connection. Touch that feels unsafe, unexpected, intrusive, painful, or poorly explained may instead activate threat responses. In that state, the stress system can override the calming effects of oxytocin.

This is highly relevant for therapists. The same technique may have very different effects depending on consent, communication, pacing, patient history, and the therapeutic relationship. A confident, respectful explanation before touch may be as important as the touch itself. The patient’s sense of control is central.

This also helps explain why trauma-informed care is not optional in manual therapy. For some patients, touch may carry a history of fear, vulnerability, or loss of control. In such cases, slower pacing, clear consent, permission to stop, and attention to the patient’s cues may allow touch to become safe again.

Touch, infants, and early development

The strongest examples of oxytocin-linked touch come from early life. Skin-to-skin contact after birth calms newborns, supports bonding, helps regulate temperature, reduces crying, and promotes breastfeeding. Kangaroo care for preterm infants has been linked with improved growth, development, milk production, and parent–infant bonding.

The article also discusses the consequences of inadequate physical contact in infants and children. Lack of touch and social interaction may contribute to impaired growth, poorer immune function, delayed social development, and “failure to thrive.” This is not only psychological. Touch may help activate vagal and gastrointestinal endocrine pathways that support digestion, metabolism, and growth.

For therapists working with infants, parents, or perinatal care, this reinforces the clinical value of safe, warm, repeated physical contact. Touch is not a luxury for babies. It is part of biological regulation.

Touch across the lifespan

Physical contact remains important beyond infancy. In adults, lack of social and tactile contact is associated with loneliness, anxiety, depression, and cardiovascular risk. During the COVID-19 pandemic, many people experienced the effects of “touch deprivation” directly: less contact, more isolation, more stress, and poorer emotional wellbeing.

Therapeutic touch may help counter some of these effects. Massage and other manual therapies have been associated with reduced anxiety, lower cortisol, reduced blood pressure, improved mood, reduced pain, and improved wellbeing. Some studies also suggest benefits for children’s behaviour, infant weight gain, maternal–infant bonding, and symptoms of depression.

However, it is important to be balanced. The evidence is promising, but not all mechanisms are fully proven. Oxytocin is likely one important pathway, but it works together with many other systems, including dopamine, opioids, serotonin, noradrenaline, the vagus nerve, and the immune system. Therapists should avoid reducing everything to oxytocin alone.

Practical implications for therapists

For therapists, the key message is that touch should be understood as both mechanical and relational.

A technique may stretch tissue, reduce muscle tone, mobilise fascia, stimulate receptors, or modulate pain. But it also occurs within a social context. The patient is not a passive body on a table. They are a nervous system interpreting safety, intention, pressure, warmth, rhythm, and trust.

Several practical principles follow:

First, begin with safety. Explain what you are doing, ask permission, and give the patient control. Safety is the gateway to the calm-and-connection response.

Second, match the touch to the therapeutic aim. Gentle, slow touch may be useful when the goal is reassurance, emotional settling, anxiety reduction, or social connection. Firmer, sustained contact may be more useful when the aim is deeper relaxation, pain relief, or stress reduction.

Third, observe the patient’s response. Signs such as slower breathing, softening of muscle tone, warmth, relaxation, calmer speech, or reduced guarding may suggest a shift toward parasympathetic regulation. Increased tension, withdrawal, breath-holding, freezing, or nervous laughter may suggest that the touch is too much, too soon, or not sufficiently safe.

Fourth, remember that repetition matters. The benefits of touch may build over time. Regular safe tactile experiences may help condition the nervous system to associate contact with safety, calm, and recovery.

Finally, be humble about the evidence. Oxytocin provides a powerful biological explanation, but clinical outcomes depend on the whole person: their history, stress level, pain state, culture, expectations, attachment patterns, and relationship with the therapist.