Why are my babies legs so stiff?
Emily Ross
Published Jan 24, 2026
Hypertonia is too much muscle tone. Infants and newborns diagnosed with hypertonia have stiff muscles, especially their arms, legs and neck, which can be difficult to move. Muscle tone is the amount of resistance (tension) to movement in your muscles.
Is it normal for babies to stiffen their legs?
Babies sometimes stiffen their legs and arms or tighten up their body when you pick them up or they get excited or frustrated. Often this type of stiffening is no big deal. Children might also stiffen up their bottoms when they're having a bowel movement, especially if the stool is hard.
What does stiffness in babies mean?
If your child seems stiff or rigid, he/she may have what is described as “high muscle tone” (hypertonia). This means that the muscles. are chronically contracted. Stiffness can become problematic in an infant when it limits the movements and acquisition of a child's gross motor skills.
What can cause stiffness in babies?
Baby nasal congestion or baby “stuffy nose” is typically caused by anything that inflames the nasal tissues - usually a cold, influenza, sinusitis, or allergies. Overall, baby congestion is just extremely annoying and nothing to worry about, but it can really affect sleep and eating habits.
When should I worry about my baby's legs?
Some kids might need to see an orthopedic doctor (bone specialist) if: The legs are not straightening on their own. The bowing is asymmetric (the legs are bowed to different degrees). The child has symptoms such as pain, limping, weakness, or trouble running.
28 related questions foundWhen do babies straighten their legs?
Your baby's legs to be bowed or feet turned up — This is caused by being held tightly in the womb. Your baby's legs will straighten out within six to 12 months.
When do babies stretch their legs out?
By 2 months, your baby will have put on a lot of weight and may be looking round and chubby. As their muscles develop, their arms and legs start to move more freely, stretching out to make them seem taller and leaner.
What are RSV symptoms in babies?
Signs and symptoms of severe RSV infection in infants include:
- Short, shallow and rapid breathing.
- Struggling to breathe — chest muscles and skin pull inward with each breath.
- Cough.
- Poor feeding.
- Unusual tiredness (lethargy)
- Irritability.
What position should a congested baby sleep in?
12) Place A Towel Under Your Baby's Mattress
Also, remember that you should always put your baby to sleep on their back.
Can congested babies suffocate?
A baby's nose, unlike an adult's, doesn't have cartilage. So when that nose is pressed against an object, like a stuffed animal, couch cushions or even a parent's arm while sleeping in bed, it can flatten easily. With the opening to its nostrils blocked, the baby can't breathe and suffocates.
How can you tell if a baby has autism?
Recognizing signs of autism
- May not keep eye contact or makes little or no eye contact.
- Shows no or less response to a parent's smile or other facial expressions.
- May not look at objects or events a parent is looking at or pointing to.
- May not point to objects or events to get a parent to look at them.
What does it mean when baby straightens legs?
If a baby appears to be arching its back while crying intensely or straightening her legs and screaming at night, it COULD be a sign of something abnormal. Back arching is a common reflex that babies exhibit when they suffer from very acute or strong pain.
Is it normal for babies to stiffen?
This condition, also called stiff baby syndrome, is when the baby stiffens her body, most notably, her legs and arms, particularly when being picked up. There are many causes for an infant to be stiff and most of them resolve over time. But in a small number of cases, a stiff baby is a sign of a birth injury.
What are signs of cerebral palsy in babies?
Cerebral palsy symptoms in babies
- Abnormal muscle tone.
- Crossed or stiffened legs when being picked up.
- Delays in sitting, crawling, rolling over, and walking.
- Difficulty grasping objects or clapping their hands.
- Excessive drooling.
- Inability to lift their own head.
- Overextended back and/or neck when being picked up.
How do you decongest a baby?
One of the safest and most effective ways to help clear a baby's congestion is with a saline (salt water) spray or nose drops. These products are available without a prescription. If you use drops, place two drops in each nostril to loosen the mucus inside.
How can I decongest my baby at night?
Run a humidifier in your baby's room while they sleep to help loosen mucus. Cool mist is safest because there aren't any hot parts on the machine. If you don't have a humidifier, run a hot shower and sit in the steamy bathroom for a few minutes multiple times per day.
What age can babies breathe through their mouth?
The usual way for your newborn baby to breathe is through their nose. This is unless their nasal passage has some blockage, which can lead to mouth breathing. Young babies don't develop the reflex to breathe through their mouths until they are 3 or 4 months old.
What are signs of Covid in infants?
COVID symptoms in babies, toddlers and children?
- Cough.
- Fever or chills.
- Shortness of breath or difficulty breathing.
- Muscle or body aches.
- Sore throat.
- New loss of taste or smell.
- Diarrhea.
- Headache.
Do babies get Covid symptoms?
The most common symptoms of COVID-19 in children are cough and fever. Possible signs and symptoms include: Fever. Cough that becomes productive.
What does wheezing sound like?
Wheezing is simply a whistling sound made when breathing. It is typically heard when a person exhales (breathes out) and sounds like a high-pitched whistle. Sometimes it is heard when inhaling — or breathing in — as well. It is not simply loud breathing or the sound of congestion or mucus when you breathe.
Are all babies flexible?
Babies are born with around 300 bones. That's 94 more than adults have. For a baby to be born, the whole skeleton has to be squashy, so many of the bones are joined with flexible cartilage. After birth, those bones start to fuse together, a process that doesn't stop until young adulthood.
Why do babies curl up their legs?
The Moro reflex causes your baby to automatically arch their back, extend their arms and legs, and sometimes cry out when they sense a loud noise or a sudden movement. Newborns can have these reactions even during sleep, but the reflex goes away after three to six months. Sucking reflex.
Are babies legs Flexible?
At birth typically developing full term infants lie with their arms and legs flexed. In fact the the muscles of the hips and knees are tight and cannot be completely stretched out.
Are babies legs supposed to be curved?
It's absolutely normal for a baby's legs to appear bowed, so that if he were to stand up with his toes forward and his ankles touching, his knees wouldn't touch. Babies are born bowlegged because of their position in the womb.
Should you straighten baby's legs?
When in the womb the baby's legs are in a fetal position with the legs bent up and across each other. Sudden straightening of the legs to a standing position can loosen the joints and damage the soft cartilage of the socket.