Newborn Baby Ko Jhatka Lagna: Startle Reflex or a Fit to Check? (Video)

Transcript

Why does a newborn suddenly fling their arms?

Why does a newborn suddenly fling their arms?

Newborn Arm Flings Explained

In this video we'll break down the common startle reflex, how to tell it apart from sleep jerks, and the key sign that means you need urgent medical help. Stay with us, because the one thing you should watch for will be revealed at the end.

What is the startle reflex?

The startle reflex, also called the Moro reflex, is a built-in safety response. When a baby hears a sudden loud sound or feels a quick head movement, their arms and legs fling out, then snap back together, often followed by a cry. It’s totally normal and usually starts to fade after about two months, disappearing by four.

Startle reflex fades

Most babies lose the Moro reflex somewhere between the second and fourth month of life. By four months the arms no longer fling out in response to a sound, and the reflex is essentially gone. Knowing this timeline helps you tell whether a sudden arm movement is just a reflex or something that needs a closer look.

Sleep jerks vs seizures

Sleep jerks are those little twitches you see when a baby drifts off, they happen only during sleep, last just a few seconds, and can repeat. In contrast, a seizure often shows up while the baby is awake, lasts longer than ten seconds, or involves one side of the body. Those are the red flags that mean you should call a doctor right away.

What to do during a fit

If you ever think a baby is having a fit, first note the start and end times, the NHS says that info is crucial. Keep the baby’s head safe by cradling gently and clear away hard objects. Never hold the baby down or put anything in the mouth; let the episode run, then place them in the recovery position.

Film the episode

If the episode happens again, grab your phone and film the whole thing from before it starts until it stops. Speak the clock time out loud or write it down so the doctor knows exactly how long it lasted. A short video can show details that a description might miss, and it saves time at the appointment.

Swaddling and rolling

Swaddling can be comforting, but you should stop as soon as the baby shows any sign of trying to roll over, which often begins around two months and definitely by four. Continuing to swaddle after rolling starts raises the risk of accidental suffocation and SIDS, especially if the baby sleeps on their stomach. Safe sleep guidelines stay the same regardless of swaddling.

The one red flag

The one thing you absolutely must watch for is any jerking that happens while the baby is awake, lasts longer than ten seconds, or is only on one side of the body. Those signs point to a possible seizure and require immediate medical attention. If you see any of them, call your pediatrician or emergency services right away.

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Read the full guide

The full guide is on thecareonline.com. General information only, so check with your doctor for your own case.