The Centers for Disease Control and Prevention says nearly 4 million sports and recreation-related concussions occur each year in this country.
Dr. Benjamin Greene at Orthopedic & Neurosurgery Specialists' new concussion center in Wilton says with spring sports in full swing, he's seeing more kids playing sports since COVID began.
One of his patients, Nicholas Feinstein from Stamford, has made a remarkable recovery from a skull fracture and concussion suffered in a bike accident about a month ago.
"I didn't remember what happened - some blurred vision, stuff like that," said Feinstein.
"He had some contusions in the front of his head and his brain from just the jolt," said his mother Hillary Feinstein.
Greene says there are signs of a concussion parents should to watch out for.
"Are they slow to get up? When they get up are they off balance? Do they stagger? Do they seem out of it or confused?" he said.
Nicholas Feinstein was just cleared to play baseball again. His football team is using special cushioned helmets. He says it's a good idea to play it safe.
"You just want to take your time going through it. You don't want to go right back because then symptoms might come back," said Nicholas Feinstein.
Doctors say symptoms of very severe concussions can sometimes last for over a year.