Claire McCarthy, MD

Claire McCarthy, MD, is a primary care pediatrician at Boston Children's Hospital and an Assistant Professor of Pediatrics at Harvard Medical School. In addition to being a faculty editor for Harvard Health Publications, Dr. McCarthy writes about health and parenting for Boston Children's Hospital, Boston.com, and the Huffington Post.


Posts by Claire McCarthy, MD

Should you swaddle your baby?

Claire McCarthy, MD
Claire McCarthy, MD, Faculty Editor, Harvard Health Publications

Swaddling a baby—wrapping him or her tightly in a blanket to give a sense of comfort and security—has been practiced for millennia. But it’s not right for all babies. In particular, several studies have revealed that swaddling can potentially cause problems hip problems and can even be dangerous if not practiced correctly. As always, if you have questions about swaddling your baby, it’s best to talk with your doctor.

Why pregnant women should avoid artificially sweetened beverages

Claire McCarthy, MD
Claire McCarthy, MD, Faculty Editor, Harvard Health Publications

Many pregnant women turn to zero-calorie artificially sweetened beverages to help avoid weight gain. However, these beverages may actually cause weight gain—and even alter your digestion and sense of taste. Recent research suggests that pregnant women who drink diet beverages to avoid weight gain may end up with heavier babies. So, if you’re pregnant, you may want to rethink that zero-calorie soda. After all, the old adage about “eating for two” is a reminder to eat and drink in ways that keep both you and your baby healthy.

The latest dangerous “addiction” parents need to worry about: Mobile devices

Claire McCarthy, MD
Claire McCarthy, MD, Faculty Editor, Harvard Health Publications

If you’ve looked up from your phone recently — or even if you haven’t! — you may have noticed that many children and teens are glued to their devices. While experts aren’t quite ready to call this an “addiction,” a new survey of parents and teens confirms that many of them suspect they’re too dependent on their devices. We’ve discussed the potential implications of this, plus suggested some “ground rules” for when to ignore those devices.

Preventing playground injuries: The fine line between safe and overprotective

Claire McCarthy, MD
Claire McCarthy, MD, Faculty Editor, Harvard Health Publications

You may have noticed that many playgrounds are now “safer” than they used to be. It’s great to think about safety, especially since there are hundreds of thousands of playground-related injuries every year, and a significant chunk of those are brain injuries like concussions. But it’s also important not to get overprotective — some life lessons about risk and self-confidence are best learned in a fun, stimulating, well-supervised environment like a playground.

Why the American Academy of Pediatrics opposes North Carolina’s transgender “bathroom law”

Claire McCarthy, MD
Claire McCarthy, MD, Faculty Editor, Harvard Health Publications

A new law in North Carolina prevents transgender people — people who feel very strongly that their biological sex does not match their true gender — from using the public restroom of the gender they identify with. But the American Academy of Pediatrics has denounced this law for discriminating against transgender children and children with certain genetic disorders. As they say, what all children need the most is unconditional acceptance and support.

How much should teens weigh to prevent heart disease as adults?

Claire McCarthy, MD
Claire McCarthy, MD, Faculty Editor, Harvard Health Publications

We know that overweight teens have a higher risk of heart disease throughout their life, which is why pediatricians make sure to discuss healthy lifestyle choices with their patients. However, a recent study reveals that the weight ranges currently considered acceptable for teens might be too high, and therefore still putting them at risk. We’ve summarized the results and given you some ideas to help your teen lead an active, healthy lifestyle.

4 “must dos” for kids with seasonal allergies

Claire McCarthy, MD
Claire McCarthy, MD, Faculty Editor, Harvard Health Publications

Many children look forward to the warm, mild spring weather — but kids with seasonal allergies (also known as hay fever) might not. Hay fever can interfere with a child’s ability to play outdoors and enjoy the change of seasons, and it can just plain make them feel miserable, too. We’ve listed four tips to help your child cope with allergy season — and they work just as well for adults, too.

FDA warns parents about arsenic in rice cereal

Claire McCarthy, MD
Claire McCarthy, MD, Faculty Editor, Harvard Health Publications

Rice has an unusually high arsenic content — and high amounts of arsenic in the body can increase the risk of cancer and learning difficulties. The FDA has recently proposed an upper limit on the amount of arsenic in infant rice cereal, but it hasn’t yet been adopted. In the meantime, we’ve listed steps you can take to reduce your — and your child’s — consumption of arsenic.

We should be ashamed if we don’t pass Tobacco 21 laws

Claire McCarthy, MD
Claire McCarthy, MD, Faculty Editor, Harvard Health Publications

Ninety percent of smokers had their first cigarette before turning 18. A movement to raise the legal age to buy tobacco in the United States to 21 hopes that making it more difficult for young people to start smoking may lead to a healthier population overall.

The inconvenient truth of vaccine refusal

Claire McCarthy, MD
Claire McCarthy, MD, Faculty Editor, Harvard Health Publications

The development of vaccines for many once-fatal illnesses has saved the lives of hundreds of thousands of children in the United States. While some parents may have concerns about the side effects of a vaccine, the decision not to vaccinate a child extends the risk of illness to the larger community.