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 chemotherapy. In another photo,

Full House star John Stamos dropped by co-star Dave Coulier's house to help prepare him for his first chemo treatment for stage 3 non-Hodgkins lymphoma cancer, sporting a bald cap in a series of Instagram pictures as a show of "solidarity"

John Stamos is facing backlash on social media for wearing a bald cap to support his “Full House” co-star Dave Coulier who shaved his head amid his stage 3 cancer battle. Stamos, 61, shared three Instagram photos Monday that featured him wearing his bald cap as he spent time with Coulier, 65.

John Stamos’ gesture to wear a bald cap in “solidarity” with his Full House co-star Dave Coulier was slammed as being “shallow.” While some admired John’s support for his friend, who was diagnosed with an “aggressive” form of cancer,

He learned of his cancer after an upper respiratory infection in October resulted in his lymph nodes swelling quickly, with one area growing to the size of a golf ball. The growth led to Coulier undergoing PET and CT scans and a biopsy at the suggestion of his doctors.

As Dave Coulier continues to go through cancer treatment, he is getting some support from his friend John Stamos.

John Stamos is showing “solidarity” amid Full House costar Dave Coulier’s cancer battle. Stamos, 61, took to social media on Monday, November 18, to share photos in which the actors smiled together, both revealing their bald heads.

Full House' actor John Stamos sported a bald cap as he shaved Dave Coulier's head amid his friend's cancer battle.

The star of "Full House," John Stamos, shows support for his friend and co-star, Dave Coulier, who is battling an aggressive cancer. John Stamos shared a touching gesture of solidarity on Instagram with Dave Coulier,