In a clip from Tuesday’s season premiere of 7 Little Johnstons, Trent and Amber take their son Alex to the doctor where the 11-year-old is diagnosed with central apnea, reports People.

“Obviously our anatomy is different than average size people,” explains Amber. “The base of our skull where the brain stem meets the spinal chord, the bone that surrounds that area is always extremely tight.”

The news comes just six months after Alex underwent surgery to remove his tonsils and adenoids due to ongoing health issues.