The death of a high school football player in Georgia after an in-game head injury has renewed concerns over safety in the sport.

According to reports, Dylan Thomas, 16, died on Sunday days after he lost consciousness on the sidelines.

Former football player Scott Schulz, of Oceanside, called the incident a tragedy. He sustained at least two concussions during his football career, which spanned from middle school until college.

“You feel sick. You get nauseous. It feels like the world is spinning,” he told News 12.

VIDEO: Ex-football player, physical therapist talk head injuries

Experts say steps are being taken to make the game of football safer. That includes better equipment and teaching players proper tackling techniques.

News 12 reported that many school districts are upgrading their helmets.

Physical therapist Bill Schwarz says the key is for players to keep their heads up.

“A child dipping their head down to hit with their helmet can be very dangerous,” said Dr. Schwarz.

If a severe collision does happen, Dr. Schwarz says adults should watch out for symptoms of a concussion, which include blurred vision, dizziness, nausea and vomiting.

Four years ago, Long Island suffered its own high school tragedy when Shoreham-Wading River High School junior Tom Cutinella suddenly died following a traumatic head injury during a game.