how do you tell the difference between adhd and bipolar when both seem possible?

ADHD and bipolar disorder can look similar on the surface, especially when someone reports distractibility, racing thoughts, restlessness, or bursts of energy. However, in clinical practice, they are usually distinguishable once a careful, structured assessment is done. While online descriptions often blur the two, psychiatrists often find that the overall pattern and context of symptoms make the distinction clearer. A key difference is the time course of symptoms. ADHD is a neurodevelopmental condition with symptoms that are chronic and trait-like, typically present since childhood, even if the degree of impairment changes over time. Bipolar disorder, by contrast, is defined by episodic mood changes, with clear periods of elevated or irritable mood that represent a departure from the person’s usual baseline. Mood and sleep patterns are particularly informative. Clinicians also consider symptom reactivity. ADHD symptoms tend to fluctuate with interest, structure, stress, and environment, whereas bipolar symptoms persist across settings until the episode resolves. Because management differs substantially, clinicians take care to establish the correct diagnosis through longitudinal history and, when possible, collateral information.