The white stuff sometimes found in a baby's armpit is likely vernix caseosa.
Understanding Vernix Caseosa
Vernix caseosa is a naturally occurring, thick, white, cheese-like substance that coats a newborn baby's skin. Here's a closer look:
- Composition: Vernix caseosa is a mixture of sebum (an oily secretion from the sebaceous glands), shed skin cells, and lanugo (fine baby hair).
- Appearance: It typically looks like a creamy, white or yellowish paste, and it may be more noticeable in skin folds, such as the armpits.
- Timing: According to the provided reference, many babies are born with vernix caseosa, which may be found covering their skin or in skin folds.
Why is Vernix Caseosa Important?
Vernix caseosa plays several important roles for a newborn:
- Protection in the Womb: It protects the baby’s delicate skin from the amniotic fluid.
- Lubrication During Birth: It helps ease the baby's passage through the birth canal.
- Skin Hydration: After birth, it helps to moisturize and maintain the baby’s skin barrier.
- Temperature Regulation: It may help regulate the baby's body temperature.
- Antibacterial Properties: Vernix caseosa has antibacterial and antimicrobial properties that help protect against infection.
Common Locations of Vernix Caseosa
While it can be found all over the baby's body, vernix caseosa is often found in:
- Skin Folds: Areas such as the armpits, groin, and neck folds often retain vernix caseosa.
- Body Surfaces: It may be more visible on a baby's back, shoulders, and scalp.
What to Do About It
Generally, you do not need to remove the vernix caseosa. It will usually absorb naturally into the baby's skin within a few days. You can gently pat dry the skin after bathing, avoiding excessive rubbing.
Key Takeaways
| Feature | Description |
|---|---|
| Name | Vernix caseosa |
| Appearance | Thick, white, cheese-like substance |
| Location | Can be found on the skin or in skin folds, such as armpits. |
| Function | Protects, lubricates, hydrates, and helps with temperature regulation. |
| Action needed | No removal is necessary; it will naturally absorb into the skin. |
