is it *just* allergies?

It's April! My favorite month! The flowers are blooming, the trees are doing their thing, the birds are chirping, and summer feels right around the corner. But maybe you're feeling... terrible? Sneezing, itchy, wired but exhausted, bloated after foods you've always eaten. You might be blaming seasonal allergies. But what if it's bigger than that?

what is histamine, anyway?

Quick explanation, not overly clinical. Histamine is a natural chemical your body makes AND gets from food. It plays a central role in your immune response and inflammation, basically acting as one of your body's first responders when it detects a threat. It also has roles in digestion and brain function.

The problem isn't histamine itself, but rather when there's more of it than your body can effectively clear. When histamine accumulates faster than you can break it down, it starts causing symptoms throughout your body.

the signs that are easy to miss

This is where histamine intolerance gets tricky. The symptoms are so varied that they often get mislabeled as anxiety, IBS, perimenopause, or just "getting older" (and if you've been here for a while, you know I don't believe "it's just your age" is an acceptable answer for any symptom 😉).

Here's what histamine intolerance can actually look like:

The more obvious ones: runny nose, sneezing, itchy or watery eyes, skin flushing, hives, headaches or migraines, and a racing heart.

The sneakier ones: bloating, diarrhea, stomach pain, brain fog, anxiety, insomnia, dizziness, and more painful or irregular periods.

If you've been told your labs are normal but you feel anything but, histamine could be a piece of that puzzle.

the bucket analogy

Think of your body as having a histamine bucket. Throughout the day, histamine pours into that bucket from multiple sources at once. Foods that are high in histamine (more on that in a second). Your own immune response. Stress hormones. Gut bacteria imbalances. Environmental triggers.

Your body has systems in place to drain that bucket, primarily an enzyme called DAO (diamine oxidase) that breaks histamine down. When your drain is working well and your bucket isn't being filled too fast, you feel fine.

But what happens when the bucket fills faster than it can drain? It overflows. And that overflow = symptoms!

So this bucket analogy explains why histamine intolerance is so confusing and so individual. You might tolerate a glass of wine just fine in the winter, but one glass in April makes you flushed. It's not that the wine changed. It's that your bucket was much closer to full before you even took a sip.

why spring makes the bucket overflow

Pollen is a major histamine trigger! And we have some of the highest pollen counts in the country here in the Pacific Northwest. Pollen doesn't just expose you to external histamine. It also causes your immune system to release MORE histamine internally as part of your inflammatory response. You're getting hit from two directions at once.

Add to that the fact that you're probably spending more time outside, maybe drinking more alcohol, and eating more fermented foods, aged cheeses, and leftovers as the weather warms up. All of those are high in histamine. Your bucket continues to fill, and now it doesn't take much to push it over the edge.

why we're seeing so much more of this clinically

Histamine intolerance exists on a spectrum, and at the more severe end of that spectrum sits mast cell activation syndrome (MCAS). In MCAS, mast cells are chronically overactivated and start releasing histamine and other inflammatory compounds in response to triggers that normally wouldn't be a huge deal... things like heat, stress, certain foods, or even just standing up too fast. 

So why are we seeing so much more of this? There are a few things I think are really driving it right now:

The enzyme that clears histamine, DAO, is produced in your gut lining. If your gut is inflamed or your microbiome is out of balance (which is increasingly common thanks to processed food diets, antibiotic use, chronic stress, and environmental toxin exposure), your ability to clear histamine is compromised before you even factor in seasonal triggers.

Hormonal shifts matter, too. Estrogen actually stimulates histamine release, which is why many notice that histamine symptoms worsen around ovulation or before their period, and why perimenopause can suddenly make histamine issues appear out of nowhere.

And I can't talk about histamine without mentioning COVID. Both the virus itself and, for some people, the vaccine, have been linked to mast cell activation and histamine dysregulation (and I want to be clear: I am not anti-vaccine. I am pro informed consent). Some people's histamine issues genuinely started or worsened after COVID or after vaccination, and that deserves to be taken seriously rather than dismissed.

We're also seeing more mold-related illness, more chronic stress, and more gut dysfunction across the board. Our buckets are starting fuller than they used to. So when spring rolls around and pollen starts piling on, it doesn't take much to have overflow.

managing histamine symptoms: control your bucket

There's no single fix here, but the core principle is simple: keep the bucket as low as possible so that when triggers come (and they will), you have room to absorb them without overflowing.

That looks like being thoughtful about high-histamine foods like aged cheeses, cured meats, alcohol, fermented foods, and leftovers that have been sitting in the fridge for a few days. It looks like supporting your gut health so your DAO enzyme can actually do its job. It looks like managing stress, because stress hormones are a real and underappreciated source of histamine load. And it looks like reducing your overall inflammatory burden, because a less inflamed body clears histamine more efficiently.

It's not about being perfect or eliminating everything delicious from your life. It's about understanding your own bucket, knowing what fills it fastest, and making choices that keep you feeling good.

what's so often missed

If you've been dealing with unexplained symptoms, reacting to foods you used to tolerate, or feeling like spring absolutely wrecks you every year, this is worth investigating. Not with Flonase and a shrug, but a true deep dive.

Histamine intolerance and MCAS are areas where conventional medicine often falls short, partly because the symptoms are so wide-ranging and partly because standard labs don't catch it. This is the kind of thing that requires someone who knows what to look for and how to connect the dots.

If you've been nodding along reading this, your body might be trying to tell you something. I'd love to help you figure out what that is. Let's chat! 

​Spring is certainly one of the most beautiful times of year, and you deserve to experience it fully, not from behind a box of tissues wondering what's wrong with you. Now get outside and enjoy those blooms!