The size, location, and appearance of the area can help doctors decide whether any tests are needed. Knowing these signs can help you understand what to watch for.
We spoke to Dr Abhishek Chopra, Senior Consultant – Neonatologist and Paediatrician at Cloudnine Group of Hospitals, Punjabi Bagh, to understand sacral dimples in babies better and share reliable, expert-backed information with parents.
What Is a Sacral Dimple in Babies?
A sacral dimple is a small dip or hole in the skin on a baby’s lower back, usually near the buttocks. It is often seen soon after birth. It is also called a spinal dimple because it is found over the lower part of the spine.How Common Are Sacral Dimples in Babies?
Sacral dimples are quite common in newborns. A recent study found that they occur in about 1.8% to 7.2% of newborn babies. Most are harmless and do not cause any problems. Only a small number are linked to an underlying spinal problem, with abnormal findings reported in about 0% to 3.4% of babies studied.
How Sacral Dimples Develop
A sacral dimple develops early in pregnancy as the baby’s spine and spinal cord are forming. During this time, the spinal cord develops from a structure called the neural tube, which normally closes as the baby grows. The lower part of the spinal cord then continues to develop. Small differences during this process may lead to a sacral dimple. Most are simple skin changes and do not cause problems.What a Normal Sacral Dimple Looks Like
In most cases, you can notice:- The dimple is close to the buttock crease
- The bottom of the dimple is clearly visible
- There is no lump or swelling nearby
- The surrounding skin looks normal
- There is no unusual hair or skin tag
- There is no fluid or discharge
What Is an Atypical Sacral Dimple?
Not every sacral dimple looks the same. A paediatrician may take a closer look when the dimple has unusual features or when there are other changes in the skin around it is called an atypical sacral dimple.According to Dr Abhishek Chopra,
“Dimples that are large, deep, placed higher on the back, or difficult to see at the bottom may need further assessment. A nearby hair tuft, skin tag, lump, unusual skin colour, or drainage can also be important.”
These signs do not automatically mean there is a spinal problem, but they may help the doctor decide whether further tests are needed.
Is a Sacral Dimple Linked to Spina Bifida?
No, a sacral dimple does not mean that a baby has spina bifida. Most sacral dimples are harmless. In a few cases, especially when the dimple looks unusual or has other skin changes around it, doctors may check for hidden spinal problems such as spina bifida.How Do Doctors Diagnose a Sacral Dimple?
A doctor may first examine the dimple carefully and look for any signs that make it different from a simple sacral dimple.Depending on the findings, the following may be considered:
- Physical examination: Checks the dimple, nearby skin, leg movements, and reflexes.
- Spinal ultrasound: Helps look at the spine in young babies.
- MRI: Gives a clearer picture of the spinal cord when needed.
How Is a Sacral Dimple Treated?
Most sacral dimples do not need treatment. If the dimple is simple and there are no concerning signs, doctors usually recommend normal hygiene and routine observation.- Simple sacral dimple: No specific treatment is usually needed.
- Keep the area clean: Gently clean it with soap and water during regular bathing.
- If infection develops: Redness, swelling, pain, or discharge may need medical treatment.
- If a spinal problem is found: Further treatment will depend on the underlying condition and may involve a specialist.
Signs That May Need Medical Evaluation
Focus on symptoms that may develop as the child grows:- Leg weakness or unusual movement
- Changes in muscle tone
- Walking or balance problems
- Bladder or bowel changes
- Developmental concerns
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FAQs on Sacral Dimple in Babies: What It Means and When to Worry
- Can a sacral dimple affect my baby's growth?
A simple sacral dimple does not usually affect a baby’s growth or development. - Can I put cream or powder inside the dimple?
Avoid putting products directly inside the opening unless your paediatrician recommends them. Keep the area clean during normal bathing. - Can a sacral dimple be mistaken for another skin condition?
Yes. Other marks or pits near the lower back can look similar, so a doctor can confirm what it is.
