Could ADHD, Allergies, and Autoimmune Conditions Be More Connected Than We Thought?
Have you ever say in a doctors office wondering, “Why do all of my health issues seem connected, but nobody can explain how” or, “I know there is something wrong but I am not getting any answers?” If this is you, you are not alone and new scientific research is beginning to explore this very idea.
Many people with ADHD also live with things like chronic allergies, digestive issues, eczema, unexplained inflammation, chronic fatigue, or autoimmune conditions. For a long time, these were treated as completely separate problems. But some new research is asking an interesting question:
“What if the brain and immune system are more connected than we realized?”
We’re still in the early days of understanding this, but recent studies are beginning to explore possible links between ADHD, mast cell activation, and autoimmune disorders.
First, what are mast cells?
Mast cells are part of your immune system. Think of them as little alarm systems in your body. When they detect something they think is a threat, they release chemicals like histamine to help protect you. The problem is that sometimes these alarm systems become overly sensitive and start reacting when they don’t need to. When mast cells become overactive, people may experience symptoms like:
Allergies or sensitivities
Hives or skin reactions
Digestive issues
Brain fog
Fatigue
Dizziness
Headaches
Symptoms that seem to affect multiple body systems. This is often referred to as mast cell activation.
So, what does this have to do with ADHD?
This is where things get really interesting (if you are a nerd like myself). Researchers are beginning to look at whether inflammation and immune activity may influence how the brain functions, particularly areas involved in attention, focus, emotional regulation, and executive functioning. Some scientists have proposed that mast cells may contribute to inflammation in the nervous system and interact with other cells involved in brain function. To be clear, this doesn’t mean that mast cell activation causes ADHD, but it does suggest there may be biological pathways that connect the immune system and the brain in ways we are only beginning to understand.
What about autoimmune disorders?
Another piece of this puzzle is the growing evidence that people with ADHD appear to have higher rates of certain autoimmune and inflammatory conditions compared to the general population. Researchers are now exploring whether there may be shared genetic, inflammatory, or immune-related factors involved. Again, this doesn’t mean ADHD is an autoimmune condition, but it does raise important questions about why so many people experience both.
As a therapist who specializes in working with ADHD and also has lived experience with ADHD and chronic health issues, I’ve had many clients say things like:
“I feel like my body is always fighting something.”
“I have ADHD, but I also have all of these physical symptoms that no one can explain.”
For many people, this emerging research feels validating because it acknowledges something they’ve been sensing for years: our mental health and physical health don’t exist in separate boxes.
Why this matters
For a long time, healthcare has often treated the brain and the body as if they are completely independent from one another. We’re learning more and more that the nervous system, immune system, and brain are constantly communicating. This doesn’t mean every person with ADHD has mast cell activation or an autoimmune condition. What it does mean is that we’re beginning to ask better questions.
Questions like:
Why do some people with ADHD also struggle with chronic inflammation or unexplained health issues?
Could immune dysfunction play a role for some individuals?
Are there biological factors we’re only starting to understand?
These are important questions, and researchers are actively trying to find the answers.
A gentle word of caution
As exciting as this research is, it’s important not to jump to conclusions. We don’t yet know whether mast cell activation causes ADHD, whether treating inflammation changes ADHD symptoms, or exactly how these conditions may be related.The science is still evolving, but I think there’s something incredibly hopeful about this research. It reminds us that our experiences are often more interconnected than we’ve been led to believe. For anyone who has spent years feeling like their symptoms didn’t fit neatly into one diagnosis or one explanation, these studies offer something important:
Permission to be curious and permission to trust that your experiences matter.
And perhaps, a reminder that the story of ADHD is still being written and we’re continuing to learn just how deeply the mind and body are connected. Finally, the medical system is starting to catch up.
References
Theoharides, T. C., & Zhang, B. (2020). Mast cell-mediated neuroinflammation may have a role in attention deficit hyperactivity disorder (Review). Frontiers in Neuroscience. Retrieved from: https://pubmed.ncbi.nlm.nih.gov/32742317/
Recent research exploring the relationship between mast cell activation, neuroinflammation, and ADHD. Retrieved from: https://pubmed.ncbi.nlm.nih.gov/42072651/
Recent research examining potential links between immune dysregulation, ADHD, and autoimmune disorders. Retrieved from: https://pubmed.ncbi.nlm.nih.gov/40686928/