VR Motion Sickness: Causes and How to Prevent It in Therapy

What Motion Sickness in Virtual Reality Is

Motion sickness, also known in this context as cybersickness or simulator sickness, is the set of symptoms (nausea, sweating, pallor, visual fatigue, disorientation, drowsiness) that some people experience when using a VR headset, especially in environments with movement.

It is the same family of symptoms that occurs on boats, in cars, or on airplanes, but the causal mechanism is slightly different: in virtual reality the conflict tends to run opposite to transportation-related motion sickness. On a boat, the inner ear detects movement that the eyes do not see (if you look down at the cabin floor). In a headset, the eyes perceive movement that the inner ear’s vestibular system does not confirm because, in reality, you are sitting still.

The brain interprets this sensory mismatch as possible poisoning (the most widely accepted evolutionary hypothesis for motion sickness is that it is a protective response against neurotoxins), which triggers the autonomic response.

Who Is More Susceptible

Susceptibility varies widely between people. Factors associated with a higher likelihood of VR motion sickness include: a history of motion sickness in transportation, vestibular migraine, balance problems or vertigo, age (older adults appear somewhat more susceptible), sex (women show a slightly higher incidence in some studies), and low hydration or insufficient sleep on the day of the session.

By contrast, repeated, gradual exposure induces habituation: most users tolerate the headset better after several sessions. This is one of the reasons the team at VRET recommends introducing virtual content progressively within clinical protocols.

It is also worth ruling out genuine contraindications: photosensitive epilepsy, clinically significant vertigo, uncorrected vision problems, or acute flu-like states may require adapting or postponing the session.

What Factors Make Motion Sickness Worse

There are four main categories of aggravating factors. The first is hardware: headsets with a low refresh rate (below 72 Hz), high latency between head movement and image, excessive weight, or a poor fit. Modern headsets for clinical use typically run at 72-120 Hz, with latency under 20 milliseconds.

The second is software: artificial camera movements (especially smooth motion without the user actually moving), fast automatic turns, acceleration, vibration, first-person perspectives with intense movement. Well-designed clinical environments avoid or minimize these elements.

The third is environmental: a hot room, poor ventilation, an enclosed space with no external visual reference point when removing the headset. A room with a comfortable temperature and an external focal point at the end of the session reduces the residual sensation.

The fourth is personal: fatigue, dehydration, a recent heavy meal, anticipatory anxiety. Some psychologists ask about these variables before starting the session.

How Modern Hardware Minimizes the Problem

The headsets currently used in clinical practice have features that substantially reduce the incidence of motion sickness compared with models from a decade ago. The high refresh rate avoids the stroboscopic effect that the brain interprets as instability. Six-degrees-of-freedom (6DoF) tracking lets your real position carry over into the virtual environment, avoiding the sensory conflict when you lean or turn.

The wide field of view, high resolution, and software distortion correction also contribute to a more coherent experience. Models designed for prolonged use distribute weight between the front and back of the head, avoiding the neck fatigue that intensifies the feeling of sickness.

This does not eliminate motion sickness, but it makes it a much less frequent problem than in earlier generations of headsets.

Recommended Acclimation Protocol

The VRET team suggests clinics use a progressive acclimation protocol for patients using a headset for the first time. The first session usually starts with static, panoramic scenes (a calm forest, a beach) for 5 to 10 minutes, with no added cognitive task. The goal is for the vestibular system to get used to the situation.

Dynamic elements (environmental movement, spatial sound, interaction) are introduced in later sessions, gradually extending the duration. Fast teleportation, first-person cameras with artificial movement, and abrupt turns are initially avoided.

If symptoms appear, it is best to pause, remove the headset, look at a distant point in the room, drink water, and breathe calmly. The sensation usually subsides within a few minutes. Forcing the protocol to continue when there is clear motion sickness adds no clinical value and undermines the patient’s motivation.

What to Do If Symptoms Persist

Motion sickness usually resolves within minutes of removing the headset. If symptoms last more than 30 minutes, it is best to wait before driving or doing activities that require fine balance. Hydrating and resting speeds up recovery.

If motion sickness recurs with significant intensity across several sessions despite the gradual protocol, the psychologist may decide to adapt the format (shorter sessions, more static content) or replace VR exposure with imaginal or in vivo exposure. Virtual reality is a tool, not an end in itself.

Cases with very severe, persistent motion sickness may require evaluation by an ear, nose, and throat specialist to rule out an underlying vestibular problem.

Common Myths About VR Motion Sickness

There are widespread ideas worth qualifying. One of the most common is that headsets are inherently dangerous for balance. The reality is that, in people without vestibular pathology, supervised clinical use has a reasonable safety profile, comparable to that of many other technological tools.

Another frequent idea is that motion sickness affects only people with low tolerance or a weak constitution. That is not the case: susceptibility depends on individual neurophysiological factors, medical history, and characteristics of the virtual content, not on the strength or weakness of the user.

It is also sometimes said that motion sickness means the headset is poorly calibrated. In most cases it is not due to a device defect but to the sensory conflict inherent to the modality. Even so, it is worth checking fit, interpupillary distance, and focus to minimize additional factors.

Comparison With Other Types of Dizziness

It is worth distinguishing simulator sickness from other forms of dizziness. Real-motion sickness (car, boat, airplane) has the opposite mechanism: the vestibular system detects movement that the eyes, when looking down or reading, do not confirm. VR motion sickness works the other way around: the eyes detect movement that the vestibular system does not confirm.

Vertigo, by contrast, is a sensation of rotation or imbalance that can have vestibular, neurological, or cardiovascular causes. It is not the same as motion sickness and usually requires medical evaluation if it persists.

Postural dizziness, associated with abrupt position changes and blood pressure problems, is another distinct entity. If you are unsure what type of dizziness you are experiencing, it is worth discussing it with your primary care physician in addition to the psychologist in charge of your headset-based treatment.

When to Be Concerned and Seek Help

Symptoms such as intense dizziness lasting more than an hour after the session, vertigo with a clear sense of the environment spinning, significant loss of balance, severe headache, or repeated vomiting are not the typical presentation of simple motion sickness. In those cases, it is best to contact your usual healthcare professional.

Likewise, if you have relevant medical history (epilepsy, vestibular problems, frequent migraines, heart problems), discuss it with your psychologist before starting the headset-based exposure protocol.

This article is for informational purposes for psychology professionals. It is not clinical advice for any individual case and does not replace the judgment of the licensed psychologist in charge. VRET is professional clinical-support software, not a CE-marked medical device.