check-ups had what doctors call positional plagiocephaly -- where the back or one side of the head has a flat spot. It develops when infants spend a lot of time with the head resting in the same position against a flat surface.
Flat spots are a cosmetic issue - not a medical problem - experts stressed, and parents should keep putting their infants on their backs to sleep.
“It still is very important to put infants to sleep on their backs to prevent SIDS,” said study author Aliyah Mawji, an assistant professor in the School of Nursing at Mount Royal University in Calgary, Alberta.
But parents can do things to prevent or alleviate the flat spot, she said -- like making sure infants have “tummy time” when they are awake and under someone’s watchful eye.
Young infants are susceptible to flat spots because the bones of the skull are not fused together -- so that the head can get through the birth canal and the skull can accommodate a rapidly growing brain later.
In recent years, doctors have been seeing more and more cases of flat spots, which is thought to be related to the Back to Sleep campaign.
For the past 20 years, experts have been advising parents to put infants on their backs to sleep, on a flat crib surface, to reduce the risk of SIDS.
The campaign (now called Safe to Sleep) seems to have worked. In the United States, it’s credited with a 50 percent drop in SIDS, according to the U.S. National Institutes of Health.
So keep putting your baby on her back to sleep, said Dr. Roya Samuels, a pediatrician at Cohen Children’s Medical Center in New Hyde Park, New York.
“Positional plagiocephaly is really a cosmetic issue,” Samuels said. “There’s no evidence that it affects the brain.”
Still, she added, “parents can get concerned.” To help reshape a flat spot, Samuels said she tells parents to lay their baby on her back with the head facing right, on Mondays, Wednesdays and Fridays. On the other days, face the head to the left.
If your baby has a flat spot on one side of the head, Samuels said you can also place mobiles or other interesting visuals to the opposite side of the crib. That will encourage your baby to turn her head to the non-flattened side.
Most of the babies in the current study had mild flat spots, and simple measures are enough to address that.
Few people actually have perfectly symmetrical heads. “Underneath our hair, most of us have lumps and bumps,” Samuels said.