Although these conditions have similar names and share some symptoms, they differ in key ways. Here’s why that’s important.

Obsessive-compulsive disorder ... (OCD). Both disorders include intense fears and attempts to prevent the feared situations from occurring. Other researchers have studied a possible association ...

Attention-deficit/hyperactivity disorder (ADHD) and obsessive-compulsive disorder (OCD) are conditions that affect how a person thinks and behaves. ADHD is a ...