Kids with ADHD tend to lie more than others. You have to remember that it’s not a character flaw, though. There can be a variety of reasons behind it from trying to express how they really feel to simply wanting to avoid getting in trouble.
One thing I always try to remember in parenting my own son is that behavior is communication. Dig deeper and look at the reason behind these behaviors, so you can make improvement.
ADDitude Community Moderator, Author & Mentor on Parenting ADHD, Mom to teen w/ ADHD, LDs, and autism