For years, I believed I was
just an anxious person.

I was afraid of forgetting everything. Not a vague fear. A concrete, daily fear, based on experience. Because I did forget. Appointments. Deadlines. Birthdays. Conversations. I forgot things that the people around me remembered effortlessly, and every forgotten thing cost me: a damaged relationship, a lost client, an offended friend.

So I built a permanent surveillance system. Check my calendar three times. Reread my messages at night to make sure I had not missed anything. Anticipate everything that could go wrong. Go to bed with a mental list of everything I must not forget tomorrow. It was anxiety, yes. But it was also the only strategy I had found to keep from sinking.

The problem is that the anxiety became its own problem. The surveillance system worked, partly, but it cost me decent sleep, a stable mental state, and the ability to relax. I was always on alert. Always checking something. Always convinced I had forgotten something, even when I had not.

Untreated ADHD is an anxiety-producing machine. Here is how it works, at least how it worked for me.

Anticipating failure. When you have accumulated enough failures caused by your forgetting, your lateness, your disorganization, you start anticipating the next one. Every new situation becomes an opportunity to mess up. You walk into a meeting wondering what you forgot to prepare. You take on a new project already thinking about the moment you will fall behind. Anticipatory anxiety is the brain trying to protect you from the consequences of your ADHD.

Overcompensation. To avoid failures, you overdo it. You arrive 45 minutes early for a 10am appointment and sit in your car staring at the ceiling. You prepare a presentation three times more than necessary because you are afraid of losing your thread. You say yes to everything to avoid disappointing anyone, and then panic because you cannot do it all. Always in maximum-effort mode. Never relaxed. It is exhausting and invisible.

Accumulated shame. Every social failure leaves a trace. The dinner where you forgot an ingredient. The time you showed up late to a job interview. Your mother's birthday that you missed. These memories pile up and feed a diffuse social anxiety. You end up dreading interactions because each one is a chance to show that you are not managing.

This is the trap I stayed in for six years. You go see a doctor. You describe your symptoms: you cannot focus, you are restless, you sleep badly, you are always tense. The doctor hears "anxiety." He prescribes something for anxiety. End of story.

The problem is that anxiety and ADHD share symptoms. Both cause concentration difficulties. Both cause restlessness. Both disrupt sleep. A doctor who does not think of ADHD will see anxiety. And he will not be wrong. He just will not have the full picture.

In my case, the anxiety diagnosis was correct. I did have an anxiety disorder. But it coexisted with an ADHD that nobody looked for because the anxiety was enough to explain the visible symptoms. Treating the anxiety alone was putting a bandage on half the problem. The other half kept bleeding.

Kessler, in his 2006 study on adult ADHD prevalence in the United States, found that nearly 50% of adults with ADHD had a comorbid anxiety disorder. One in two. That is not a rare coincidence. It is the norm. And yet, in clinical practice, ADHD is rarely looked for in a patient presenting with anxiety.

Here is how my psychiatrist helped me see the difference. This is not a diagnostic tool. It is what helped me understand what came from where in my own head.

The source of inattention. When ADHD is the cause, inattention comes from a lack of stimulation. The brain disconnects because what is in front of you is not interesting enough to hold it. When anxiety is the cause, inattention comes from overload. The brain is so busy worrying that it has no room to focus on anything else.

The response to stress. My psychiatrist asked me: "When you have a deadline in two hours, what happens?" Answer: I finally get to work and I am hyper-efficient. That is pure ADHD. The stress creates the stimulation the brain needs. A person with anxiety alone, facing the same deadline, would be paralyzed by panic.

The history. ADHD has been there forever. Since childhood. Even if nobody saw it. Anxiety can appear later, often as a consequence of untreated ADHD. In my case, concentration difficulties existed since first grade. The anxiety appeared around 18-19, when the social consequences had accumulated.

The effect of treatment. When you treat ADHD in someone who has both, the anxiety often decreases without specific treatment. Because part of the anxiety was reactive. When forgetting decreases, when concentration improves, when you fail less often, there is less reason to be anxious.

This is the question I asked my psychiatrist when the dual diagnosis came in. "Where do we start?" His answer: "We start with ADHD. Because if the anxiety is largely reactive to the ADHD, treating the ADHD will reduce it."

That is partly what happened. When I started managing my ADHD symptoms better, when the forgetting decreased, when my days became less chaotic, the anxiety dropped a notch. Not completely. But I noticed after about six weeks that I was no longer checking my calendar at night before going to sleep. It is a small detail, but it meant something had shifted.

The background anxiety, the one that possibly exists independently of the ADHD, stayed. For that, CBT helps me. Not psychoanalysis, not guided meditations from YouTube. CBT with a therapist who understands ADHD and does not tell me to "breathe deeply" when I am in the middle of startup paralysis.

My psychiatrist also explained that some ADHD medications (stimulants, like Ritalin) can temporarily increase anxiety in people who have both. It is a delicate adjustment. It requires regular follow-up and a doctor who is comfortable with comorbidity. Not all are. That is a reality you should know about so you do not get discouraged if the first try is not the right one. And if, reading all this, it is exhaustion and emptiness that speak to you more than worry, I describe that side in the ADHD and depression page.

These are not tips. This is what I, personally, have found helps me live with a brain that is both ADHD and anxious. It might not work for you. It works for me, most of the time.

Naming what comes from where. When I feel the restlessness rising, I ask myself: "Is this the ADHD or the anxiety?" If it is ADHD (I am bored, my brain is looking for stimulation), I change activities or add movement. If it is anxiety (I am anticipating failure, I am ruminating), I stop and write down what is bothering me. Just sorting it out reduces the intensity.

Radical externalization. Everything that is in my head needs to come out of my head. Tasks go in Notion. Worries go in a notebook. Appointments go in the calendar. My brain is not reliable for storage. And what it stores badly, it turns into anxiety. Externalizing is clearing the RAM to reduce the noise.

Physical movement. Exercise is the only thing I have found that calms both ADHD and anxiety simultaneously. Not yoga (my brain checks out after two minutes). Fast walking. Running. Cycling. Something that requires enough physical effort to occupy the brain and reduce the energy overflow.

Accepting the bad days. There are days when both hit at the same time. The ADHD preventing you from starting and the anxiety panicking because you are not starting. The knotted stomach and the empty brain. On those days, I have learned (well, I am trying to learn) that fighting is pointless. I lower expectations to the bare minimum. One thing in the day. If I do it, that is enough. If I do not, tomorrow exists.

A lot of people ask me the question this way around: "anxiety or ADHD, what is the difference?" I understand it, because I asked myself the same thing for six years without finding an answer. The confusion comes from the fact that the visible symptoms almost completely overlap. Trouble concentrating, restlessness, sleep that will not come, a constant sense of being overwhelmed. From the outside, it is the same picture.

What changes is what sits underneath. Anxiety starts with anticipation: the brain scans the future for what could go wrong, and that surveillance eats all the bandwidth. ADHD starts with a stimulation deficit: the brain drops whatever is not interesting enough to hold it. Two different engines, one result that looks alike.

One question comes up often: can anxiety cause ADHD? No. ADHD is a neurodevelopmental condition, it has been there since childhood, anxiety does not manufacture it. But an anxiety disorder can create the illusion of ADHD, and untreated ADHD produces real anxiety. That is exactly why the two mask each other. If you are torn between the two labels, it is not for you to settle alone. It is a reason to see a psychiatrist, ideally one trained in adult ADHD, and describe both sides. I walk through what an evaluation looks like on the diagnosis page.

I will be honest right away: I have not lived OCD from the inside. What I write here comes from my reading and from conversations with people who do have both. I say it because I do not want to pretend to know an experience that is not mine.

Obsessive-compulsive disorder, OCD, rests on two pieces. Intrusive thoughts that cause distress, and rituals, mental or physical, to bring that distress down. Checking the door is locked, ten times. Washing your hands until it "feels right." ADHD rests on a deficit in regulating attention and impulsivity. On paper, the two have nothing to do with each other.

The problem is that in real life, the same behavior can come from both. Checking your calendar three times: for me, that is ADHD layered with anxiety, I check because I know I forget. For a person with OCD, checking can be a ritual meant to neutralize an intrusive thought. The action is identical, the origin is opposite. That is exactly the kind of nuance a psychiatrist is there to untangle, and that neither you nor I can settle on our own.

One thing to keep in mind: ADHD and OCD can coexist in the same person, and it is not rare. If you recognize yourself in both descriptions, it does not mean you are wrong about one. It means it is worth an evaluation that looks at both.

There is one form of anxiety so specific to ADHD that it has its own name in the community: rejection sensitive dysphoria, RSD. It is not an official diagnosis, and I want to be clear about that. But it describes something real that I, and a lot of people with ADHD, recognize instantly.

RSD is a sudden, intense emotional pain triggered by real or perceived rejection or criticism. Not disappointment. Pain. A colleague gives flat feedback on your work and, for a few hours, you feel genuinely crushed. A friend takes a while to reply and your mind has already built the whole story where they are done with you. It comes fast, it hits hard, and the size of the reaction rarely matches the size of the trigger.

It overlaps with social anxiety, and that is why I put it here. Both make you dread interactions. But the texture is different. Social anxiety is a slow, background worry before and during the interaction. RSD is a sharp spike, usually after, when something lands as rejection. The link to ADHD runs through emotional regulation: the same brain that struggles to regulate attention also struggles to regulate the intensity of feelings. I go deeper into that in the ADHD and emotions page, and into RSD itself in rejection sensitive dysphoria.