Doctors are raising the alarm about head injuries after Bob Saget's unexpected death in January.

A month after the beloved actor was found dead in an Orlando hotel room, his family says Saget died from an accidental head injury.

Dr. Justin Thomas of the neurosurgery department at South Shore University Hospital says the tragedy highlights the importance of taking head injuries seriously.

"It doesn't always require a significant force to create a substantial injury," Thomas says. "The reason for that is because the brain tissue and the surrounding blood vessels can be more delicate as people age and also people who are on a variety of medications for other medical diagnosis, which function as blood thinners."

Many people suffer bumps on the head at some point, but health officials there are some signals where medical attention is needed.

Dr. Barry Rosenthal, of NYU Langone Hospital's emergency department, says significant signs that someone may need to be hospitalized after a head injury are a persistent headache, nausea, vomiting and inability to concentrate. He says those are the symptoms of a concussion.

Doctors say it's a good idea to let a family member, spouse or friend know if you suffered a head injury so someone can help monitor the situation.