When ADHD Isn’t the Whole Story
Last week, I was diagnosed with hypothyroidism.
Looking back, I’m stunned it took so long to find the answer. Months of unexplained symptoms had me questioning everything—my ADHD, my mental health, and at times, my sanity.
If you have ADHD and have been feeling “off” in ways you can’t quite explain, I hope this story about ADHD and thyroide health brings you clarity, comfort, and maybe even the nudge you need to get things checked out.
The Overlap Between ADHD and Hypothyroidism
For weeks, I just wanted to sleep.
Fatigue wasn’t just a feeling—it consumed me. I’d wake up more tired than when I went to bed. Nights were no better, with insomnia and a jittery mind keeping me from rest. My body sent signals I didn’t know how to interpret: tingling limbs, slurred speech, shaky hands, and a startle reflex so intense even a knock on the door felt like an ambush.
And then came the fog. I struggled to hold a thought, form a sentence, or even string together simple tasks. As someone with ADHD, I knew distraction and forgetfulness, but this felt different—like my brain had just shut off.
Then there were the things I was afraid to mention: hallucinations, paranoia, delusional thoughts. I worried I was losing touch with reality. It turns out, these were signs of a severe depressive episode with psychotic features—often triggered by hormonal imbalances, including thyroid dysfunction.
ADHD Symptoms Can Mask (or Mimic) Thyroid Health Issues
ADHD already brings challenges with focus, memory, and motivation. So it’s no wonder that thyroid disorders—especially hypothyroidism—can sneak under the radar.
Common Hypothyroidism Symptoms:
- Constant fatigue or low energy
- Brain fog and forgetfulness
- Cold intolerance
- Muscle cramps or stiffness
- Weight gain despite poor appetite
- Dry skin and thinning hair
- Constipation
- Depression or mood swings
Common Hyperthyroidism Symptoms:
- Nervousness or irritability
- Short attention span or mental fog
- Insomnia
- Sweating and overheating
- Diarrhea
- Rapid heartbeat or palpitations
- Unexplained weight loss
- Hair loss
- Restlessness or anxiety
Notice a pattern? Many of these symptoms overlap with ADHD, depression, and anxiety.
Could It Be Something More Than ADHD?
About 80% of individuals with ADHD will experience at least one other mental health condition in their lifetime. Depression and anxiety are the most common. But thyroid disorders? They’re often missed.
That’s why it’s essential to look beyond a checklist of symptoms. ADHD is a medical diagnosis, but so are hypothyroidism and hyperthyroidism. If you’re experiencing new or worsening symptoms, especially physical ones, it’s time to dig deeper.
Your healthcare provider should conduct a thorough physical exam, including:
- Bloodwork (TSH, T3, T4 levels)
- Family history screening
- Mental health evaluation
- Review of current medications
Don’t settle for assumptions. Rule out what can be ruled out.
How Depression and Anxiety Intertwine with ADHD and Thyroid Health
Depression and anxiety can both be symptoms of thyroid imbalance or coexist with ADHD entirely.
Signs of Clinical Depression (Beyond ADHD):
- Persistent sadness or emotional numbness
- Sleep disturbances (too much or too little)
- Loss of interest in activities you usually enjoy
- Changes in appetite or weight
- Physical slowing or agitation
- Feelings of worthlessness or guilt
- Thoughts of death or suicide
Anxiety in ADHD:
- Excessive worry or avoidance
- Difficulty with transitions or unexpected changes
- Fear of failure or judgment
- Overthinking and mental paralysis
Both depression and anxiety can be exacerbated by untreated thyroid conditions. And all three—ADHD, thyroid disorders, and mood disorders—require different treatment approaches.
Getting an Accurate Diagnosis
If you suspect something deeper than ADHD is going on, speak up. Your provider may use tools like:
- Beck Depression Inventory
- Automatic Thoughts Questionnaire
- SCID-5 or DSM-5 interviews
- Blood tests for thyroid function
Don’t be afraid to describe what you’re experiencing in full, even if it feels unrelated or scary. Your truth helps guide your healing.
What Helped Me
Recovery started with a diagnosis, but healing began when I permitted myself to rest.
Here’s what helped me, and what might help you:
- Rest without guilt
Your body is not lazy; it’s asking for what it needs. Respect that. - Simplify everything
Break tasks into the smallest possible chunks. Tiny wins count. - Ask for help
Support from ADHD coaches, doctors, therapists, or even friends can help lift the fog. - Find your rhythm again
Routines bring relief, but allow room for spontaneity and joy. - Stop masking
You don’t have to perform neurotypical. Let yourself just be.
You’re Not Crazy—You’re Human
Managing life with ADHD is already demanding. Add thyroid dysfunction or mood disorders, and it’s no wonder you feel overwhelmed. But here’s the truth:
✨ You don’t need to be fixed.
✨ You’re not failing.
✨ You’re just a human with a beautiful, complex brain—navigating a lot.
Your symptoms are valid. Your experience is real. And most importantly, you are not alone.
If you’ve ever wondered whether something more than ADHD is going on, trust that instinct. The sooner you know, the sooner you can start feeling like you again.
Let’s Talk
Have you experienced a thyroid disorder alongside ADHD or depression? I’d love to hear your story. Send me a message or reply to this post—your voice matters, and it might help someone else.
I have all three – hypo-thyroidism, depression, and ADHD. They are a more than full-time balancing act that, these days, I frequently lose. This requires a precipitous climb back to my version of normalcy.
I remember having feelings of depression when I was 17, but thought that I was simply very melancholy, and didn’t know why.
I’ve been hypothyroid since I was 19; I’m now 63. It was hardly ever fully managed; I often felt lethargic and had very low energy. I gained weight.
Depression and hypo-thyroidism were interspersed with bouts of ADHD. I could often balance them when I had something of high interest and drive in which to participate or try to achieve, although it was a very tentative balance. I constantly fought it and often lost. After which I’d resume the climb back to my version of normalcy.
My spouse was passive-aggressive and manipulative. He both took advantage of, and subliminally attacked, many of my leading and positive traits.
I was extremely anxious and clinically depressed after 2-3 years of marriage. During that time I had two different ER visits due to my depression. I didn’t know what was going on; even after being told I had depression, I didn’t believe that I could have it. I’d never in my life fallen so low, mentally.
I was clinically diagnosed w/depression when I sought help during the 4th year of marriage, per recommendations from my ER visits. After a year or so of treatment I finally found some help through the medications prescribed.
I wasn’t diagnosed with ADHD until I was approximately 45-48. I’d heard an in-depth report on adult ADHD on NPR, and realized that I checked about every box. I related this to my psychiatrist, who apologized for not having diagnosed it.
I think I’m battling all of the same things.I was never a good student.Couldn’t pay attention.I had my first child at 25 & had Postpartum depression I’ve been on medication ever since. I did however get off medication for a short time with a homeopathic doctor that had me on supplements but I also take thyroid medicine but I have struggles so bad with anxiety
Hello Cathleen,
Thank you for sharing your experience. It is such a shame that you went so many years with an incorrect or at least only a partial diagnosis. As a trained Psychiatric Mental Health Nurse Practitioner, I understand the tendency to treat the “presenting symptoms”. With ADHD, however, the presenting symptoms can look like depression or anxiety. Educating the professionals about these “symptoms” would make a huge difference in our diagnoses and finding an effective treatment. Thanks again.~Laurie
Your posts never fail to brighten my day. Thank you for spreading positivity!
I’m curious how they treated your psychotic symptoms. And how did they know it was related to your thyroid and ADHD diagnosis?