At some point everyone who lives with a boom-and-crash cycle asks the question. Is this bipolar? I asked it too. I start things with enormous energy, I go for weeks, and then I crash hard. From the outside, that sounds a lot like the textbook.
Here's where I've landed for myself, and then the part that matters more for you. Nobody has ever diagnosed me with bipolar disorder. My diagnoses are Autism Spectrum Disorder (ASD), BPD and ADHD. When I compare my cycles to how mania is actually defined, they don't line up very well. That's my read, not a diagnosis, and you shouldn't use my read for yours.
So how do you tell? Bipolar mania is an extreme high or irritable mood that lasts at least a week, usually with a much smaller need for sleep, and it shows up on its own schedule. Neurodivergent energy cycles tend to follow an interest or a demand, and they end in exhaustion. The two can also exist in the same person. A clinician needs to see the whole picture.
What mania and hypomania actually are
The NIMH bipolar disorder booklet describes manic episodes in bipolar I as lasting at least seven days, most of the day, nearly every day. One of the hallmark signs is a decreased need for sleep. Depressive episodes usually last at least two weeks. The mood changes are extreme, well beyond ordinary ups and downs.
CAMH puts mania as being continuously high and euphoric, or irritable and angry, for at least a week. Hypomania is the milder version. The person might feel happy and full of energy, but their life usually isn't seriously disrupted. That's exactly why hypomania can slip by unnoticed.
CAMH also says bipolar disorder is hard to diagnose. People tend to look for help when they're depressed, not when they're flying, so the doctor only sees half the cycle. And there's no lab test, though tests can rule out things that look similar, like thyroid problems.
Why I don't think mine were mania
I've gone over this a lot. Two things push me away from the bipolar explanation, at least for me, and then there's an asterisk.
My highs followed something. A project. An idea. A new obsession. The energy was attached to a thing. Take away the thing and the high went with it. Mania, the way it's described, is a mood state that colours everything.
And I was tired. I just ignored it. In a boom I'd stay up late, but I felt it. I pushed through. That's different from not needing sleep, which is how mania is described. Feeling no fatigue on three hours' sleep for a week is a very different animal from running on fumes because you can't stop thinking about a thing.
The crash looked like burnout. When I read the research from the Autism CRC burnout project, one finding jumped out. Autistic burnout was often misdiagnosed as depression, anxiety, bipolar disorder or borderline personality disorder. My biggest crash was a breakdown in the COVID years, and that's when the autism diagnosis finally came. The exhaustion and the pulling away from people were straight out of that study.
There's a big asterisk. For a lot of years I was using drugs. During that time I couldn't have told you what my natural mood even was. Substances blur this whole question, and if you use or used, a clinician needs to know. Leaving it out of the history makes it much harder to get the answer right.
How the two patterns tend to differ
This is a rough guide, not a test. Plenty of people won't fit neatly.
Where the energy comes from. Neurodivergent booms usually hook onto an interest, a deadline or a new idea. Manic or hypomanic episodes tend to arrive as a change in mood that isn't tied to one thing.
Sleep. In mania there's a decreased need for sleep. In an ADHD or autistic boom, people often sleep badly because they can't stop, but still feel the cost.
How long. Mania lasts at least a week by definition. Hyperfocus can last hours or days around a specific task, then drop when it ends.
What the low looks like. A bipolar depressive episode is depression, lasting at least two weeks. An autistic crash can look like depression too, which is exactly why they get confused. (I wrote about that in burnout or depression?.)
And again: you can be autistic or have ADHD and also have bipolar disorder. Finding one doesn't rule out the other.
What to do if you're not sure
Track it. A mood chart or a paper calendar with a number for each day. Mood, sleep, energy, what was going on. A few months of that is worth more than any blog post, including this one. CREST.BD, a research network at UBC, has bipolar self-management tools built with people who live with it, and they're useful for tracking even before you know what you have.
Then bring it to someone who can assess it. Your family doctor first, who can refer you to psychiatry if needed. In Québec, if you don't have a doctor, Info-Social 811 or a CLSC can point you in the right direction. Relief, formerly Revivre, is the main Québec organization for depression and bipolarity and runs self-management groups.
Bipolar disorder is very treatable. NIMH is clear that treatment helps many people, even with the most severe forms. If it turns out that's what you have, you'd finally have a name for something that can be managed. And nobody should take or stop medication without a doctor in the loop.
If you're in a low right now and it's gotten dark, the Get help now page has numbers for your country. For more on my own cycle, see boom, then crash.