This reply was originally posted by user adhdmomma in ADDitude’s now-retired community.
Could very well be depression (https://www.additudemag.com/adhd/article/1015.html). Could also be that the activities of this vacation just didn’t suit him (too much waiting time). The more he’s interested, the better his moods will be, and the better his brain will function.
Plus, he’s at the age where he really wants to be independent and do his own thing.
Here’s more on raising teens with ADHD:
ADDconnect Moderator, Author & Mentor on Parenting ADHD, Mom to teen w/ ADHD, LDs, and autism