Most newborns have some peculiar characteristics. Fortunately they are temporary. Your baby will begin to look normal by 1 to 2 weeks of age.
This discussion of these newborn characteristics is arranged by parts of the body. A few minor congenital defects that are harmless but permanent are also included. Call your healthcare provider if you have questions about your baby's appearance that this list does not address.
- Molding Molding refers to the long, narrow, cone-shaped head that results from passage through a tight birth canal. This compression of the head can temporarily hide the fontanel. The head returns to a normal shape in a few days.
- Caput This refers to swelling on top of the head or throughout the scalp due to fluid squeezed into the scalp during the birth process. Caput is present at birth and clears in a few days.
- Cephalohematoma This is a collection of blood on the outer surface of the skull. It is due to friction between the infant's skull and the mother's pelvic bones during the birth process. The lump is usually confined to one side of the head. It first appears on the second day of life and may grow larger for up to 5 days. It doesn't resolve completely until the baby is 2 or 3 months of age.
- Anterior fontanel The "soft spot" is found in the top front part of the skull. It is diamond-shaped and covered by a thick fibrous layer. Touching this area is quite safe. The purpose of the soft spot is to allow rapid growth of the brain. The spot will normally pulsate with each beat of the heart. It normally closes with bone when the baby is between 12 and 18 months of age.
- Swollen eyelids The eyes may be puffy because of pressure on the face during delivery. They may also be puffy and reddened if silver nitrate eyedrops are used. This irritation should clear in 3 days.
- Subconjunctival hemorrhage A flame-shaped hemorrhage on the white of the eye (sclera) is not uncommon. It's harmless and due to birth trauma. The blood is reabsorbed in 2 to 3 weeks.
- Iris color The iris is usually blue, green, gray, or brown, or variations of these colors. The permanent color of the iris is often uncertain until your baby reaches 6 months of age. Children who will have dark irises often change eye color by 2 months of age; children who will have light-colored irises usually change by 5 or 6 months of age.
- Tear duct, blocked If your baby's eye is continuously watery, he or she may have a blocked tear duct. This means that the channel that normally carries tears from the eye to the nose is blocked. It is a common condition, and more than 90% of blocked tear ducts open up by the time the child is 12 months old.
- Folded over The ears of newborns are commonly soft and floppy. Sometimes one of the edges is folded over. The outer ear will assume normal shape as the cartilage hardens over the first few weeks.
- Earpits About 1% of normal children have a small pit or dimple in front of the outer ear. This minor congenital defect is not important unless it becomes infected.
- Flattened The nose can become misshapen during the birth process. It may be flattened or pushed to one side. It will look normal by 1 wk old.
- Sucking callus (or blister) A sucking callus occurs in the center of the upper lip from constant friction at this point during bottle- or breast-feeding. It will disappear when your child begins cup feedings. A sucking callus on the thumb or wrist may also develop.
- Epithelial pearls Little white-colored cysts can occur along the gumline or on the hard palate. These are a result of blockage of normal mucous glands. They disappear after 1 to 2 months.
- Teeth The presence of a tooth at birth is rare. Approximately 10% are extra teeth without a root structure. The other 90% are prematurely erupted normal teeth.The extra teeth should be removed, usually by a dentist. The normal teeth need to be removed only if they become loose (with a danger of choking) or if they cause sores on your baby's tongue.
- Engorgement Swollen breasts are present during the first week of life in many female and male babies. They are caused by the passage of female hormones across the mother's placenta. Sometimes the breast will leak a few drops of milk, and this is normal. Breasts are generally swollen for 2 to 4 weeks, but they may stay swollen longer in breast-fed and female babies.
- Swollen labia The labia minora can be quite swollen in newborn girls because of the passage of female hormones across the placenta. The swelling will resolve in 2 to 4 weeks.
- Hymenal tags The hymen can also be swollen due to maternal estrogen and have smooth 1/2-inch projections of pink tissue. These normal tags occur in 10% of newborn girls and slowly shrink over 2 to 4 weeks.
- Vaginal discharge As the maternal hormones decline in the baby's blood, a clear or white discharge can flow from the vagina during the latter part of the first week of life.
- Hydrocele The newborn scrotum can be filled with clear fluid. The fluid is squeezed into the scrotum during the birth process. This painless collection of clear fluid is called a "hydrocele." It is common in newborn males. A hydrocele may take 6 to 12 months to clear completely. It is harmless but can be rechecked during regular visits.
- Undescended testicle The testicle is not in the scrotum in about 4% of full-term newborn boys. Many of these testicles gradually descend into the normal position during the following months. In 1-year-old boys only 0.7% of all testicles are undescended; these need to be brought down surgically.
- Tight foreskin Most uncircumcised infant boys have a tight foreskin that doesn't allow you to see the head of the penis. This is normal and the foreskin should not be retracted.
- Erections Erections occur commonly in a newborn boy, as they do at all ages. They are usually triggered by a full bladder. Erections demonstrate that the nerves to the penis are normal.
BONES AND JOINTS
- Tight hips As long as the upper legs can be bent outward to 60 degrees and are the same on each side, they are fine. The most common cause of a tight hip is a dislocation.
- Tibial torsion The lower legs (tibia) normally curve in because of the cross-legged posture your baby was confined to while in the womb. Both of these curves are normal and will straighten out after your child has been walking for 6 to 12 months.
- Feet turned up, in, or out Feet may be turned in any direction inside the cramped quarters of the womb. As long as your child's feet are flexible and can be easily moved to a normal position, they are normal. The direction of the feet will become more normal between 6- 12 months of age.
- Long second toe The second toe is longer than the great toe as a result of heredity in some ethnic groups that originated along the Mediterranean, especially Egyptians.
- "Ingrown" toenails Many newborns have soft nails that easily bend and curve. But, they are not truly ingrown because they don't curve into the flesh.
- Scalp hair Most hair at birth is dark. This hair is temporary and begins to shed by 1 month of age. Some babies lose it gradually while the permanent hair is coming in; others lose it rapidly and temporarily become bald. The permanent hair will appear by 6 months. It may be an entirely different color from the newborn hair.
- Body hair (lanugo) Lanugo is the fine downy hair that is sometimes present on the back and shoulders. It is more common in premature infants. It is rubbed off with normal friction by 2 to 4 weeks of age.