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 defended his actions after facing backlash for wearing a bald cap to show support for fellow “Full House” star Dave Coulier, amid his cancer battle. The internet attacked the famous actor when he shared Instagram posts of himself shaving Coulier’s head,

Dave Coulier, who has an "aggressive" form of Non-Hodgkin lymphoma, said he "laughed out loud" when he saw his "Full House" co-star in a bald cap.

In an Instagram post with multiple photos, Stamos is seen wearing a bald cap in support of Coulier who recently shaved his head to take preventive measures as he starts chemothera

Dave Coulier dismissed the criticism leveled at John Stamos after he wore a bald cap in support of Coulier's ongoing cancer battle.

Dave Coulier and John Stamos have a long history. The two spent years filming the beloved series Full House together, but their friendship did not end there. After the 65-year-old revealed he was diagnosed with stage 3 Non-Hodgkin lymphoma,