Any therapy that affects the body carries some chance of adverse effects. CST is no exception. Being honest about what's been documented in the medical literature matters for anyone thinking about the work. Brushing off safety concerns isn't responsible practice. Neither is treating a few case reports as proof that CST is routinely dangerous.
Dr John McPartland DO put together a series of case reports documenting adverse effects after cranial manipulation. Neurological symptoms, dizziness, and other effects following cranial techniques. His work was a contribution to the field's self-awareness about safety, not a polemic against CST.
Knowing what case reports are — and what they can and can't tell you — is essential for reading this literature fairly.
What the case reports document
McPartland's collection of adverse case reports included patients who experienced neurological symptoms, increased head pain, vertigo, and other concerning effects after cranial manipulation. Some involved more aggressive techniques — not the gentle 5–10 gram touch typical of modern CST, but more forceful cranial and intraoral work used by some practitioners.
Case reports tell you something happened after a treatment. They don't tell you how often. They're drawn from unusual cases that were notable enough to be written up and published. If a hundred thousand CST sessions are given and three produce adverse effects, those three are the ones that show up in the literature. The other 99,997 don't get a write-up.
The cases McPartland documented are a real safety concern, particularly for techniques involving more force or intraoral work. They are the field's own record of what can go wrong, and they should shape how CST is practised — with appropriate caution for certain presentations and clear communication with clients about what to watch for.
Gentle CST versus more forceful techniques
Not all cranial work is the same. Cranial osteopathy, where trained osteopaths apply cranial techniques as part of a wider practice, can involve more force than the gentle touch typical of dedicated CST sessions. Some adverse events in McPartland's review involved techniques most CST practitioners trained through Upledger or biodynamic lineages wouldn't recognise as what they do.
The 5–10 gram contact that defines standard CST is lighter than a coin resting on skin. It's an extremely gentle intervention. Most safety concerns in the literature involve heavier, more directive cranial manipulation rather than this kind of light-touch work.
This doesn't make adverse events impossible with gentle CST. There are cases of increased symptoms, headache and disorientation after even very gentle sessions. But the risk profile of light-touch CST is likely meaningfully different from that of more forceful cranial techniques. Worth asking which tradition your practitioner trained in, and how they apply the work, before you start.
The overall safety picture
Across the safety literature on CST, serious adverse events look rare. The most common experiences after sessions are temporary: increased symptoms for a day or two, fatigue, mild dizziness, or emotional shifts that settle within twenty-four to forty-eight hours. Some practitioners describe these transient responses as part of integration.
Where extra caution is warranted: people with recent head injury, current intracranial bleeding or raised intracranial pressure, recent spinal surgery, or active neurological conditions should talk to their physician before starting CST. Practitioners with good training in anatomy and history-taking will spot these contraindications themselves and will either decline to work with someone until medical advice is in, or adapt their approach significantly.
For the general population exploring CST for stress, pain or wellbeing, the work is considered low-risk when done by someone with appropriate training. The case reports in the McPartland literature are important for the field to know about, but they don't overturn the broader picture of a therapy that is, for most people in most circumstances, gentle and safe.
Honest engagement with CST's safety literature means neither ignoring adverse event reports nor treating them as more representative than they are. The work is generally low-risk. Serious adverse events are rare. Certain presentations call for extra caution and a medical consultation.