Shannen Dohertyis sharing an update on her battle with cancer.

TheCharmedactressposted a videoTuesday of her recent radiation treatment, which took place in January.

“My fear is obvious,” Doherty wrote in the caption on Instagram.

BEVERLY HILLS, CALIFORNIA - OCTOBER 05: Shannen Doherty poses for a portrait in the Getty Images & People Magazine Portrait Studio at Hallmark Channel and American Humanes 2019 Hero Dog Awards at the Beverly Hilton on October 05, 2019 in Beverly Hills, California. (Photo by Neilson Barnard/Getty Images for Hallmark Channel )

Shannen Doherty.Neilson Barnard/Getty

“I am extremely claustrophobic and there was a lot going on in my life.

I am fortunate as I have great doctors like Dr. Amin Mirahdi and the amazing techs at Cedar Sinai.

The turmoil….. the timing of it all….

This is what cancer can look like.”

“Rooting for you, my irreplaceable friend,” wrote Kevin Smith, who directed Doherty inMallrats.

But when those moments pass, let that indomitable Doherty spirit take over anew.

I love you so much, my Mallrat."

“Thinking of you and sending positive thoughts,” addedReal Housewivesstar Kyle Richards.

In 2020 she announced thather cancer had returned as stage 4.

Doherty attended theCharmedreunion at 90s Con in March alongside fellow alumsRose McGowanandHolly Marie Combs.

There, shetold the cheering crowd, “I’m feeling great, thank you!”