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 was caught off guard by the controversy his bald cap tribute to Dave Coulier has caused on social media. The actor ripped critics who slammed his Instagram post featuring the former “Full House” co-stars just days after Coulier announced he’d been diagnosed with Stage 3 non-Hodgkin lymphoma.

John Stamos found himself in controversy after wearing a bald cap in an Instagram post supporting his longtime friend and former Full House co-star Dave Coulier.