John Stamos Reacts To Backlash For Bald Cap Pics With Dave Coulier After Coulier's Cancer Diagnosis

The "Full House" alum revealed Thursday that he wasn't able to shave his head because he's filming a new project soon — and said the criticism "really hurt me."

John Stamos says he didn’t expect to receive such backlash for supporting a friend.

On Tuesday, the “Full House” alum shared a photo on Instagram of himself wearing a bald cap with his former costar Dave Coulier, who announced last week that he was diagnosed with Stage 3 non-Hodgkin lymphoma.

While Stamos wrote in the post’s caption that there’s “Nothing like throwing on a bald cap” to “show some love and solidarity,” some people questioned why he hadn’t shown further solidarity by shaving his head.

Stamos told a TMZ reporter who spotted him at Los Angeles International Airport on Thursday that he was “so shocked” by the negative response to his post.

“First I’ll say, I’m just embarrassed, and they’re embarrassing,” the actor said. “But when I started seeing this blowback, I’m just like, ‘What?’ I couldn’t figure it out. I still don’t know 100 percent.”