The mysterious illness has symptoms that mimic that of Kawasaki disease or toxic shock.
Mindi Herman's then 6-month-old son experienced that first hand.
"He did develop this global rash on his body," said Herman who lives in Montgomery County, Pennsylvania. "Josh's platelets were in the millions. I was in touch with the doctor, and at the time it was an extremely rare disease. She recognized it and said, 'I think it's Kawasaki disease.'
Herman's son was later diagnosed with the disease.
Mindi’s son was diagnosed w/ #KawasakiDisease. It was uncommon in 1987, and is rare today, but the number of children suffering from symptoms mimicking Kawasaki are climbing. The mysterious illness is Pediatric Multisystem Inflammatory Syndrome associated w/ COVID19 @6abc pic.twitter.com/BY58mb0Ego— Christie Ileto (@Christie_Ileto) May 13, 2020
RELATED: More hospitals reporting rare syndrome in kids, possibly linked to COVID-19
It was uncommon in 1987, but Kawasaki disease was known to follow viral infections. Today, the number of children suffering from symptoms mimicking the disease are climbing.
New numbers include 150 cases nationwide. The CDC set to issue a warning this week.
Locally, doctors at Children's Hospital of Philadelphia, St. Christopher's Hospital for Children, and Nemours DuPont Hospital have all treated several kids with the syndrome recently.
The symptoms include high fever, rash, redness to eyes and lips, and if not caught quickly it can prove deadly.
"It can lead to inflammation all over the body, in the heart, kidneys, the blood vessels," said Dr. Emily Souder, the attending physician for pediatrics infectious diseases at St. Christophers.
As pediatricians are now urging parents to eye potential symptoms, Herman says to trust your instincts.
"If I had just dismissed that Friday visit as tonsillitis, and was just that mom that was like, 'Ok he has tonsillitis, I don't want want to bother the doctor.' No, call on that phone, bother that doctor, if you suspect something is bigger than what you can handle, call that doctor," she said.
MORE COVID-19 COVERAGE
Pennsylvania students expected to return to school in fall, ed chief says
Voices grow louder in Bucks County asking Gov. Wolf to ease COVID-19 restrictions
Action News Troubleshooters: Know your employee rights before heading back to work
Gov. Murphy: New Jersey expected to have dates for start of reopening process soon
Man arrested for assaulting employee who asked him to wear mask, police say
Full guide: COVID-19 help, information and resources
Keeping Reusable Shopping Bags Sanitized and Germ-Free during COVID-19 Outbreak
How to get groceries, supplies, takeout, online workouts and home projects while quarantining
Things for everyone to do to pass the time at home
Great homeschooling and educational resources for parents and students
Free 6abc printable activities for kids to do at home
Work from home: Here are some companies hiring remote workers
CONNECT WITH US
Share your coronavirus story with Action News
Complete coronavirus coverage from Action News
Nominate a 6abc Hometown Hero