Physical Development

My Baby Has Webbed Fingers or Toes (Syndactyly)

Medically reviewed by Dr. Sarah Chen, MD, FAAP · Board-Certified Pediatrician

Content reviewed against published ASSH, Boston Children's, NIH guidelines

Editorial policy

Last reviewed:

Your baby's physical development is unique, and concerns about has webbed fingers or toes (syndactyly), here is what you need to know.

The short answer

Syndactyly (webbed or fused fingers or toes) is one of the most common congenital hand and foot differences, occurring in about 1 in 2,000-3,000 births. It can be simple (just skin connecting the digits) or complex (bones or other tissues fused). Webbed toes often require no treatment and do not affect function. Webbed fingers, particularly those involving the thumb or ring/small fingers, are typically treated with surgery to improve hand function. The timing and approach depend on which digits are affected.

Key takeaways

  • Syndactyly (webbed or fused fingers or toes) is one of the most common congenital hand and foot differences, occurring in about 1 in 2,000-3,000 births. It can be simple (just skin connecting the digits) or complex (bones or other tissues fused). Webbed toes often require no treatment and do not affect function. Webbed fingers, particularly those involving the thumb or ring/small fingers, are typically treated with surgery to improve hand function. The timing and approach depend on which digits are affected.
  • Usually normal when: Your baby has simple webbing between two toes — this is very common and usually requires no treatment
  • Call your doctor if: The affected digits are turning blue, white, or appear to have poor circulation — seek immediate evaluation
  • Varies by age — see the age-by-age breakdown below
“Supervised tummy time is recommended daily from the time the baby comes home from the hospital to help prevent flat head syndrome and to strengthen neck and shoulder muscles.”
— Back to Sleep, Tummy to Play, American Academy of Pediatrics (AAP)

Parents everywhere have the same worry. You are doing the right thing by looking into it.

What Parents Should Know

According to ASSH, Boston Children's, NIH guidelines, syndactyly (webbed or fused fingers or toes) is one of the most common congenital hand and foot differences, occurring in about 1 in 2,000-3,000 births. It can be simple (just skin connecting the digits) or complex (bones or other tissues fused). Webbed toes often require no treatment and do not affect function. Webbed fingers, particularly those involving the thumb or ring/small fingers, are typically treated with surgery to improve hand function. The timing and approach depend on which digits are affected. At 0-3 months, syndactyly is usually noticed at birth. Your pediatrician will examine the affected digits and may order an X-ray to determine if bones are also fused (complex syndactyly) or if only skin is involved (simple syndactyly). A referral to a pediatric hand surgeon or orthopedic surgeon is typical. In most cases, no immediate treatment is needed — this is a time for evaluation and planning. It is generally considered normal when your baby has simple webbing between two toes — this is very common and usually requires no treatment. However, you should contact your pediatrician promptly if the affected digits are turning blue, white, or appear to have poor circulation — seek immediate evaluation.

Sources: [1], [2], [3]

Normal vs. Concerning

Usually Normal
Worth Discussing
Your baby has simple webbing between two toes — this is very common and usually requires no treatment
The affected digits are turning blue, white, or appear to have poor circulation — seek immediate evaluation
Your baby has mild skin webbing between fingers that the hand surgeon says can wait for planned surgery
After surgery, the hand or foot shows signs of infection — increasing redness, swelling, warmth, or discharge
Your child had syndactyly release surgery and the fingers are healing well with good range of motion
The syndactyly involves more than two digits or seems to be part of a pattern of other differences

By Age

What to expect by age

0-3 months

Syndactyly is usually noticed at birth. Your pediatrician will examine the affected digits and may order an X-ray to determine if bones are also fused (complex syndactyly) or if only skin is involved (simple syndactyly). A referral to a pediatric hand surgeon or orthopedic surgeon is typical. In most cases, no immediate treatment is needed — this is a time for evaluation and planning.

3-12 months

If surgery is recommended, it is typically performed between 6 and 18 months of age. Earlier surgery (around 6 months) may be recommended when digits of different lengths are fused (like the ring and small finger), as the shorter digit can pull on the longer one and cause deviation during growth. For toes, surgery is often unnecessary because toe syndactyly rarely affects walking or function.

12-24 months

This is the most common window for syndactyly release surgery. The procedure involves separating the digits and using skin grafts (often from the groin or wrist) to cover the newly separated fingers. Recovery involves wearing a cast or splint for several weeks. Results are generally very good, with excellent hand function. Your child will likely need hand therapy after surgery.

2 years+

After surgery, follow-up continues to ensure the digits grow well and the grafted skin heals properly. Some children need revision surgery as they grow. For isolated simple syndactyly (especially of the toes), if it was not treated surgically, it typically causes no functional issues. Syndactyly can sometimes occur as part of a broader syndrome — your doctor may check for other associated features.

What to Tell Your Pediatrician

  • Describe when you first noticed has webbed fingers or toes (syndactyly) and how it has changed over time.
  • Note your baby's current age and which age-specific patterns you are seeing.
  • Mention if the syndactyly involves more than two digits or seems to be part of a pattern of other differences.
  • Mention if you notice the fused digits seem to be bending or deviating as your baby grows.
  • Let your doctor know if you have noticed any related concerns, such as changes in feeding, sleep, or movement patterns.
  • Bring a list of any questions or observations you want to discuss at the appointment.

What Should You Do?

When to take action

Probably normal when...
  • Your baby has simple webbing between two toes — this is very common and usually requires no treatment
  • Your baby has mild skin webbing between fingers that the hand surgeon says can wait for planned surgery
  • Your child had syndactyly release surgery and the fingers are healing well with good range of motion
Mention at your next visit when...
  • The syndactyly involves more than two digits or seems to be part of a pattern of other differences
  • You notice the fused digits seem to be bending or deviating as your baby grows
  • Your child is having difficulty grasping or using their hand because of the syndactyly
  • The skin between webbed toes is becoming irritated or infected
Act now when...
  • The affected digits are turning blue, white, or appear to have poor circulation — seek immediate evaluation
  • After surgery, the hand or foot shows signs of infection — increasing redness, swelling, warmth, or discharge

What You Can Do at Home

  • Keep track of when you notice has webbed fingers or toes (syndactyly) — noting the time of day, duration, and any triggers can help your pediatrician.
  • Remember that your baby has simple webbing between two toes — this is very common and usually requires no treatment — this is generally within the range of normal.
  • At 0-3 months, focus on observation rather than intervention unless your pediatrician advises otherwise.
  • Provide plenty of supervised floor time and tummy time to support your baby's physical development.
  • While monitoring at home, seek immediate care if the affected digits are turning blue, white, or appear to have poor circulation — seek immediate evaluation.

My Baby's Feet Turn Inward (Metatarsus Adductus)

Metatarsus adductus is the most common foot deformity in newborns, affecting about 1 in 1,000 babies. The front half of the foot turns inward, giving it a curved or kidney-bean shape when viewed from below. It is thought to result from the position of the baby in the uterus. The good news is that 85-90% of cases resolve on their own without treatment by age 1. Flexible cases (where you can gently straighten the foot) have an excellent prognosis. Rigid cases may benefit from stretching, casting, or special shoes.

My Baby Was Diagnosed with Pierre Robin Sequence

Pierre Robin sequence (PRS) is a condition present at birth characterized by three features: a small lower jaw (micrognathia), a tongue that falls back in the mouth (glossoptosis), and often a U-shaped cleft palate. The small jaw causes the tongue to sit far back, which can obstruct the airway and make breathing and feeding difficult. While the diagnosis is frightening, the jaw typically grows significantly during the first 1-2 years of life, and most children's airway problems improve substantially. Treatment focuses on ensuring safe breathing and adequate nutrition.

Milestone

Month-by-Month Development

Detailed monthly development guides from birth through 24 months.

Guide

When to Call the Doctor

General guide on when to call the pediatrician, visit urgent care, or go to the ER.

Frequently asked questions

Is has webbed fingers or toes (syndactyly) normal?
Syndactyly (webbed or fused fingers or toes) is one of the most common congenital hand and foot differences, occurring in about 1 in 2,000-3,000 births. It can be simple (just skin connecting the digits) or complex (bones or other tissues fused). Webbed toes often require no treatment and do not affect function. Webbed fingers, particularly those involving the thumb or ring/small fingers, are typically treated with surgery to improve hand function. The timing and approach depend on which digits are affected.
When should I call the doctor about has webbed fingers or toes (syndactyly)?
The affected digits are turning blue, white, or appear to have poor circulation — seek immediate evaluation After surgery, the hand or foot shows signs of infection — increasing redness, swelling, warmth, or discharge
When is has webbed fingers or toes (syndactyly) normal?
Your baby has simple webbing between two toes — this is very common and usually requires no treatment Your baby has mild skin webbing between fingers that the hand surgeon says can wait for planned surgery Your child had syndactyly release surgery and the fingers are healing well with good range of motion
What causes has webbed fingers or toes (syndactyly)?
Syndactyly (webbed or fused fingers or toes) is one of the most common congenital hand and foot differences, occurring in about 1 in 2,000-3,000 births. It can be simple (just skin connecting the digits) or complex (bones or other tissues fused). Webbed toes often require no treatment and do not affect function. Webbed fingers, particularly those involving the thumb or ring/small fingers, are typically treated with surgery to improve hand function. The timing and approach depend on which digits are affected. Common explanations include: Your baby has simple webbing between two toes — this is very common and usually requires no treatment. Your baby has mild skin webbing between fingers that the hand surgeon says can wait for planned surgery.
What should I mention to my pediatrician about has webbed fingers or toes (syndactyly)?
You should mention has webbed fingers or toes (syndactyly) at your next visit if: The syndactyly involves more than two digits or seems to be part of a pattern of other differences. You notice the fused digits seem to be bending or deviating as your baby grows. Your child is having difficulty grasping or using their hand because of the syndactyly.
Is has webbed fingers or toes (syndactyly) normal at 0-3 months?
Syndactyly is usually noticed at birth. Your pediatrician will examine the affected digits and may order an X-ray to determine if bones are also fused (complex syndactyly) or if only skin is involved (simple syndactyly). A referral to a pediatric hand surgeon or orthopedic surgeon is typical. In most cases, no immediate treatment is needed — this is a time for evaluation and planning.
Is has webbed fingers or toes (syndactyly) normal at 3-12 months?
If surgery is recommended, it is typically performed between 6 and 18 months of age. Earlier surgery (around 6 months) may be recommended when digits of different lengths are fused (like the ring and small finger), as the shorter digit can pull on the longer one and cause deviation during growth. For toes, surgery is often unnecessary because toe syndactyly rarely affects walking or function.
Should I go to the ER for has webbed fingers or toes (syndactyly)?
Seek emergency care if the affected digits are turning blue, white, or appear to have poor circulation — seek immediate evaluation, or if after surgery, the hand or foot shows signs of infection — increasing redness, swelling, warmth, or discharge. When in doubt, call your pediatrician's after-hours line for guidance.
Does has webbed fingers or toes (syndactyly) go away on its own?
In many cases, has webbed fingers or toes (syndactyly) resolves on its own, especially when your baby has simple webbing between two toes — this is very common and usually requires no treatment. By 2 years+, after surgery, follow-up continues to ensure the digits grow well and the grafted skin heals properly. Some children need revision surgery as they grow. For isolated simple syndactyly (especially of the toes), if it was not treated surgically, it typically causes no functional issues. Syndactyly can sometimes occur as part of a broader syndrome — your doctor may check for other associated features.
ASSHBOSTON CHILDREN'SNIH

References

  1. [1]American Society for Surgery of the Hand. Syndactyly. ASSH
  2. [2]Boston Children's Hospital. Syndactyly (Webbed Fingers). Boston Children's
  3. [3]National Library of Medicine. Syndactyly. StatPearls, 2024. NIH

Doctor Visit Checklist

Bring this checklist to your next pediatrician visit to discuss My Baby Has Webbed Fingers or Toes (Syndactyly).

Things to mention

  • Describe when you first noticed has webbed fingers or toes (syndactyly) and how it has changed over time.
  • Note your baby's current age and which age-specific patterns you are seeing.
  • Mention if the syndactyly involves more than two digits or seems to be part of a pattern of other differences.
  • Mention if you notice the fused digits seem to be bending or deviating as your baby grows.
  • Let your doctor know if you have noticed any related concerns, such as changes in feeding, sleep, or movement patterns.
  • Bring a list of any questions or observations you want to discuss at the appointment.

Observations to share

  • The syndactyly involves more than two digits or seems to be part of a pattern of other differences
  • You notice the fused digits seem to be bending or deviating as your baby grows
  • Your child is having difficulty grasping or using their hand because of the syndactyly

Urgent signs to report immediately

  • The affected digits are turning blue, white, or appear to have poor circulation — seek immediate evaluation
  • After surgery, the hand or foot shows signs of infection — increasing redness, swelling, warmth, or discharge

My notes

From ismybabyalright.com — free, evidence-based baby health guides

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Bottom line

Most cases of has webbed fingers or toes (syndactyly) are normal. Talk to your pediatrician if the affected digits are turning blue, white, or appear to have poor circulation — seek immediate evaluation.

Trust your instincts. If something feels wrong, reach out to your pediatrician. Worrying about your baby means you care — that is a good thing.

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My Baby's Feet Turn Inward (Metatarsus Adductus)

Metatarsus adductus is the most common foot deformity in newborns, affecting about 1 in 1,000 babies. The front half of the foot turns inward, giving it a curved or kidney-bean shape when viewed from below. It is thought to result from the position of the baby in the uterus. The good news is that 85-90% of cases resolve on their own without treatment by age 1. Flexible cases (where you can gently straighten the foot) have an excellent prognosis. Rigid cases may benefit from stretching, casting, or special shoes.

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Pierre Robin sequence (PRS) is a condition present at birth characterized by three features: a small lower jaw (micrognathia), a tongue that falls back in the mouth (glossoptosis), and often a U-shaped cleft palate. The small jaw causes the tongue to sit far back, which can obstruct the airway and make breathing and feeding difficult. While the diagnosis is frightening, the jaw typically grows significantly during the first 1-2 years of life, and most children's airway problems improve substantially. Treatment focuses on ensuring safe breathing and adequate nutrition.

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