What Side Do You Lay a Person Having a Seizure?

Either side works for most people, but the far more important detail is when you roll them. During an active convulsive seizure, you should not try to force someone onto their side at all. Once the convulsions stop and the person is unresponsive but breathing, gently roll them into a side-lying recovery position to protect the airway. For pregnant women in the second or third trimester, the left side is preferred. The timing of that roll, not the choice of left versus right, is what can genuinely save a life.

Why Timing Matters More Than Which Side

The instinct to immediately roll a seizing person onto their side is understandable. The logic seems obvious: keep the airway clear. But a 2025 scoping review of seizure guidelines and original research found no evidence that putting someone on their side during an active convulsion reduces respiratory disturbances or the likelihood of aspiration. The same review found that trying to turn someone mid-seizure can result in shoulder dislocations severe enough to require surgery and can also make it harder for bystanders to recognize cardiac arrest if it occurs.¹

The reasoning comes down to what is happening inside the body at each stage. During a generalized tonic-clonic seizure, the chest muscles are contracting involuntarily. Breathing is disrupted or temporarily halted by the seizure activity itself, not by fluid pooling in the throat. Oral secretions are not usually increased during the convulsive phase, and aspiration, when it occurs, is far more likely in the minutes after the convulsion ends. That postictal window is when muscles relax, secretions accumulate, and the person is unconscious and unable to protect their own airway.²

So the critical move is not rolling someone during the seizure. It is being ready to roll them the moment the jerking stops, when breathing resumes but consciousness has not yet returned.

What to Do During the Active Seizure

While a convulsive seizure is underway, your job is simpler than you might think. Clear the area around the person so they cannot hit their head or limbs on furniture, sharp corners, or hard surfaces. If possible, place something soft under their head. Note the time the seizure started, because if it continues beyond five minutes, emergency services should be called.

Do not restrain the person. Do not hold down their arms or legs. Do not put anything in their mouth. The idea that someone can swallow their tongue during a seizure is anatomically impossible; the tongue is anchored to the floor of the mouth and cannot travel backward into the throat. Forcing a wallet, spoon, or finger between clenched jaws risks breaking teeth, injuring the jaw, and causing lacerations to the person’s mouth or your hand.³ This myth persists despite decades of medical education efforts to dispel it.

Do not attempt CPR unless you are certain the person has stopped breathing and has no pulse after the seizure ends. During the seizure itself, chest compressions are ineffective and unnecessary in the vast majority of cases.

How to Position Someone After the Seizure Stops

Once the convulsive movements cease, the person typically enters a postictal state: unconscious or semi-conscious, confused, and often breathing shallowly. This is the moment to act on positioning. Research on postictal breathing shows that oxygen saturation can plummet after a generalized convulsive seizure, with some patients dropping to dangerously low levels within the first minute of the postictal phase.⁴ The recovery position helps because gravity assists in draining saliva, blood from a bitten tongue, or any vomit away from the airway.

To place someone in the recovery position:

Kneel beside them: If they are already on their back, kneel at their side and extend the arm nearest to you outward at a right angle to the body.
Position the far arm: Take the hand furthest from you and place it against their cheek on your side, holding it there.
Bend the far knee: Pull up the knee of the leg furthest from you so the foot is flat on the ground.
Roll gently: Use that bent knee as a lever to roll the person toward you onto their side. Their head should rest on the hand you placed against their cheek.
Open the airway: Tilt the head back slightly and adjust the top hand under the cheek so the airway stays open and the face is angled slightly downward to allow drainage.

For a non-pregnant adult without a suspected spinal injury, either the left or right side is fine. There is no clinical evidence showing one side is superior to the other in this scenario. Whatever side gives you better access given the environment, the furniture, and the person’s position on the ground is the right choice.

The Exception for Pregnant Women

If the person having a seizure is visibly pregnant, the left side is the better choice, and this is one situation where the specific side genuinely matters. In later pregnancy, the weight of the uterus can compress the large vein that returns blood from the lower body to the heart when a woman lies flat on her back. This compression can reduce blood flow enough to lower blood pressure and compromise oxygen delivery to both the mother and fetus.

An MRI study of pregnant women found that tilting to the left at 30 degrees roughly doubled the volume of blood flow through that vein compared to lying supine or tilting to the right at equivalent angles. About 70% of the women in the study had their best blood-flow measurements in the left-lateral position.⁵ The anatomy behind this is straightforward: the vein runs slightly to the right of the spine, and the uterus falls away from it when the body tilts left.

Seizures during pregnancy can occur in women with pre-existing epilepsy or as a feature of eclampsia, a dangerous complication of late pregnancy. In either case, left-lateral positioning after the seizure ends is standard guidance. If you can only manage to get a pregnant woman onto her right side, that is still vastly better than leaving her flat on her back.

When You Suspect a Neck or Spine Injury

If someone has a seizure after a fall, a car accident, or any event that might have injured their spine, rolling them into the standard recovery position introduces a risk of worsening a cervical injury. The conventional lateral roll involves rotating the neck, and in someone with an unstable vertebral fracture, that movement could damage the spinal cord.

For these cases, a modified approach called the HAINES position (High Arm IN Endangered Spine) produces less neck movement and less lateral bending of the spine than the standard recovery position.⁶ The key difference is that one of the person’s arms is raised above the head before the roll, which helps stabilize the head and neck during the turn. In practice, this is a technique primarily used by trained first responders, but the principle for bystanders is simple: if you suspect a spine injury and the person is breathing, minimize movement. Keep the head, neck, and torso aligned as much as possible. Only roll them if they are vomiting and you need to clear the airway to prevent choking, and do so as a “log roll,” moving the entire body as a unit.

If you are unsure whether a spinal injury is involved, err on the side of caution and keep movement to a minimum while waiting for paramedics. The exception, as always, is if the airway is clearly compromised and you need to act to prevent suffocation.

The Prone Position and SUDEP

Sudden unexpected death in epilepsy, known as SUDEP, is the most feared complication of seizure disorders, and body position appears to play a role. A disproportionate number of SUDEP victims are found lying face down. Research on nonfatal convulsive seizures in monitored settings found that ending up prone was actually uncommon when patients were closely supervised, a stark contrast to the frequency of the prone position in fatal cases.⁷

The implication is that supervision and repositioning after a seizure may be protective. If someone has a seizure and ends up face down, turning them onto their side once the convulsions stop could be one of the most important things a bystander does. Whether the prone position itself contributes to death, perhaps by obstructing breathing when postictal muscles are too weak to turn the head, or whether it is simply a marker for unwitnessed and unassisted seizures, remains an active area of investigation. But practically, the message is consistent with everything else: once the seizure ends, get the person off their stomach and into a side-lying position with a clear airway.

When to Call Emergency Services

Not every seizure requires an ambulance, but several situations do. Call emergency services if the seizure lasts longer than five minutes, if a second seizure follows without the person regaining consciousness, if the person is injured, if it is their first known seizure, if they are pregnant, if they have diabetes, if the seizure happens in water, or if they do not start breathing normally after the convulsions stop. For someone with a known seizure disorder who has a typical episode and recovers as expected, emergency transport may not be necessary, but staying with them until they are fully alert is still important.

The five-minute threshold matters because prolonged seizures become harder to stop on their own and carry a higher risk of brain injury. Bystanders tend to dramatically overestimate how long a seizure lasts; the average convulsive episode runs about one to two minutes, though it can feel much longer when you are watching it. Checking the time when the seizure begins gives you an objective measure to relay to dispatchers.

Why So Many People Still Get This Wrong

Despite widespread access to health information, misconceptions about seizure first aid remain remarkably common. A systematic review covering studies from the Eastern Mediterranean Region found that roughly 39% of people surveyed believed placing an object in a seizing person’s mouth would prevent tongue biting, and fewer than 4% of respondents had received any formal first aid training at all.⁸ While those figures come from a specific region, other surveys around the world show similar patterns of misconception and lack of preparedness.

The good news is that relatively brief training makes a measurable difference. One epilepsy peer education program found that the share of students who felt competent to help during a seizure jumped from about 21% before training to 54% afterward, with significant gains in recognizing seizure symptoms and knowing the correct response steps.⁹ A separate U.S.-based pilot of a seizure first aid certification program also showed significant improvements in both knowledge and confidence among participants.¹⁰

The core actions are simple enough to teach in minutes: protect the person from hazards, do not restrain them, do not put anything in their mouth, time the seizure, and roll them onto their side once the convulsions stop. The persistent gap between what the evidence recommends and what bystanders actually do in the moment is not a problem of complicated instructions. It is a problem of the wrong instructions, especially the mouth-object myth, being deeply embedded in popular culture and passed from one generation to the next. If you remember one thing from this article, make it the timing: sides are for after the seizure, not during.