Hannah Zulueta Cancer · Phlegm · TCVM
You Found A Lump
What histamine has to do with masses, which foods raise the load, and why I took my own dog off raw.
Maybe it is small. Maybe it appeared overnight. Maybe your vet has already biopsied it and given you a name: benign cyst, lipoma, mast cell tumor, histiocytoma. Or maybe you are still waiting to find out, looking everything up in the meantime, trying to work out whether there is anything you can do through diet.
The one thing
Inflammation is fuel for abnormal cell growth.
Histamine creates an inflammatory environment in the body. The more inflammatory that environment, the more you are potentially feeding the problem. That is the whole argument, and it is why the food in the bowl is worth looking at while you wait for answers.
Diet will not cure a tumor. Let me be clear about that, and your vet’s medical recommendations carry the most weight here. But diet does create an internal environment that either supports healing or works against it, and that part is in your hands today.
Why this got personal
Maggie’s story
My dog Maggie first showed allergy symptoms at eight months old. We managed it through food, got her off Apoquel and Cytopoint, and I thought we had it under control.
Then the lumps started appearing. First a benign sebaceous cyst on her shoulder, right at the site of a previous vaccination. Then a skin tag along her spine. Most recently a cutaneous histiocytoma that grew rapidly on her elbow.
She has also broken out in hives four times in her life. The kind that come on fast and need immediate medical intervention.
All of it was connected. The allergies, the hives, the lumps. All of it came back to histamine, and once I understood that, everything about how I fed her changed.
I know that particular brand of worry that comes with finding something on your dog that was not there before. I have been there. So let me walk you through what I have learned.
Western view
What histamine actually is
Histamine is a chemical compound your dog’s body produces as part of the immune response. It is stored in mast cells and basophils, both types of white blood cell, and it is released when the body meets an injury, an allergen or a pathogen.
Once released, it triggers inflammation, increased blood flow and swelling. That is useful. It is how the body fights something off.
The problem arrives when some dogs produce too much of it, or their bodies cannot break it down efficiently. Then you get chronic inflammation, persistent allergic symptoms, and the part people do not always connect: the growth and development of lumps, bumps and masses can be made worse.
Eastern view
Qi stagnation and phlegm
TCVM looks at this differently and arrives in the same place. Health depends on the smooth flow of Qi and Blood through the body. When that flow is disrupted or stagnant, problems develop.
Excess histamine creating inflammation, or Qi stagnation creating phlegm accumulation. Two vocabularies, one underlying problem: an environment where abnormal growth is more likely to occur. The goal in both is the same, which is an internal environment where flow is free and inflammation is low.
The bowl
Histamine in food
Here is what caught me off guard when I started researching this. Histamine is not only produced by your dog’s body. It is also present in certain foods, especially fermented, aged or improperly stored ones.
Feed high-histamine food to a dog already struggling with histamine and you are adding to their total load. More inflammation, more immune activation, and potentially more growth of the masses that are already there.
Plenty of dogs handle dietary histamine perfectly well. These are the dogs who cannot.
The list
High-histamine foods to avoid
If your dog has lumps, bumps, tumors or chronic allergies, minimize or remove these.
Green tripe is the one that surprises people. It is a fermented food, and it belongs on this list for the same reason kefir does.
This includes the supplements. Glucosamine and chondroitin are frequently derived from shellfish, and most people never check the source.
The hard one
The raw feeding question
This is where it gets complicated, especially if you have been feeding raw for years.
Raw meat contains higher levels of histamine than cooked meat.
Histamine-producing bacteria live on the surface of meat, and they multiply rapidly at certain temperatures. Cooking kills them, so less histamine is produced. Feed raw and those bacteria stay active. Even with careful handling and immediate freezing, histamine levels in raw meat run higher than in cooked.
For Maggie, with her history of allergies, hives and lumps, I made the decision to switch from raw to cooked.
That was not easy. I was a raw feeding advocate and I believed in it deeply. But looking at the evidence for my specific dog with her specific problems, cooked made more sense.
Your situation may be different. If your dog has histamine-related issues and you are feeding raw right now, it is worth asking whether that is contributing to their total load.
Histamine was one reason among several. I wrote the full account of what changed my mind here: why I stopped feeding my dogs raw.
A real trade-off
The shellfish supplement dilemma
A lot of joint supplements contain glucosamine and chondroitin derived from shellfish. For most dogs these work beautifully and keep joints healthy and mobile into old age.
If your dog has allergies, hives, lumps or mast cell tumors, you need to weigh the risk and the benefit carefully. Shellfish-derived supplements can trigger allergic reactions, and since mast cells are a critical part of the immune system, introducing anything that might cause a reaction carries real risk.
What I chose for Maggie. Given her breed’s predisposition to mast cell tumors, and given her history of allergies and lumps, I decided I would rather manage potential joint problems later than risk fueling mast cell activity now. I keep her lean. I feed an anti-inflammatory diet. I am betting on prevention rather than trying to manage two problems at once.
This is not a reason to stop your dog’s joint supplement without thinking it through. If your dog has histamine issues, talk to your vet about whether the shellfish-derived version is the right choice for them.
What is in the bowl
What I feed Maggie now
Every meal is designed to minimize inflammation and create an internal environment where lumps are less likely to grow.
The question I get most
Raw or cooked for a dog with a tumor?
Based on what I know about histamine, bacterial loads, and the interstitium, the network of fluid-filled spaces throughout the body that can distribute bacteria systemically, my answer for dogs with lumps, bumps or tumors is cooked.
- Cooking eliminates histamine-producing bacteria.
- It reduces the total histamine load.
- It decreases the risk of bacterial translocation through the gut.
- It still provides all the nutrients of fresh food.
- It is easier to digest, which reduces the burden on systems already under strain.
Cooked does not mean meat in a pan. You still need proper protein ratios, an appropriate calcium source, balanced nutrients, and foods chosen for their therapeutic properties rather than their nutritional content alone.
Next steps
What to do this week
When not to do this alone
I formulate diets professionally and I still had to think hard about how to feed Maggie. If you are dealing with a mast cell tumor diagnosis, multiple lumps, chronic allergies alongside tumors, or a dog with a history of adverse food reactions, do not build this yourself.
The stakes are too high. A poorly formulated diet can create new problems while you are trying to solve the ones in front of you.
Work with me
A low-histamine diet that is still complete
I work with dogs who have lumps, bumps and tumors regularly. That means formulating low-histamine meals that still meet nutritional standards, choosing foods by TCVM energetics to move Qi and reduce phlegm, transitioning your dog off the high-histamine items without destabilizing them, and adjusting as your dog responds. All of it alongside your vet rather than instead of them.
Related reading: why I stopped feeding my dogs raw, interdigital cysts and Damp Heat, spring flare-ups and the Wood element, and how to home-cook.
The bottom line
You have more control than you think
Finding a lump on your dog is frightening. I know. Diet will not cure a tumor, and your vet’s medical recommendations carry the most weight in this.
But diet does create an internal environment that either supports healing or works against it. Minimizing histamine through food is one concrete thing you can do starting today. It is not a guarantee and it is not a cure. It is one piece of the puzzle that makes sense from a Western medical view and a TCVM view at the same time.
And you do not have to work it out alone.
Resources
Where this comes from
- Misdorp W. Mast cells and canine mast cell tumours, a review. Vet Q. 2004 Dec;26(4):156-69. PMID 15663212.
- Prester L. Biogenic amines in fish, fish products and shellfish, a review. Food Addit Contam Part A. 2011 Nov;28(11):1547-60. PMID 21834642.
- Sánchez-Pérez S, Comas-Basté O, Veciana-Nogués MT, Latorre-Moratalla ML, Vidal-Carou MC. Low-histamine diets: is the exclusion of foods justified by their histamine content? Nutrients. 2021 Apr 21;13(5):1395. PMID 33919293.
The information on Daily Dog Food Recipes is intended for nutritional, informational and educational purposes only. Nothing here is intended to diagnose, cure, treat or prevent any disease or illness. Please consult your veterinarian about your dog’s medical care.
Hannah Zulueta obtained her Certificate in Canine Nutrition from CASI Institute. She is also studying for her Doctorate in Acupuncture, Traditional Chinese Medicine, and Herbalism from the esteemed Pacific College of Health and Medicine. If you’re as keenly interested in health for yourself, visit her website for human health: Satori Acupuncture and Herbs.
She resides in San Diego with her three dogs, Maggie, Orbit, and Mr. Higgins.
She is available for one on one consultations. She develops evidence-based recipes that meet both NRC and AAFCO nutritional standards while integrating the therapeutic food principles of Traditional Chinese Veterinary Medicine into her formulations.
Additionally, you can find her sharing free content on Instagram.
Hi Hannah,
Ive been reading up on histamines and Mast Cell Activation Syndrome (MCAS) in humans..
And also researching foods with histamines for myself the last few months… so I’m learning from 2/3 different perspectives…. its been an interesting topic.
Human site on the topic say its the aged and processed meats that need to be avoided.. “All refrigerated and fresh meats are high histamine unless they’ve been immediately frozen upon catch or slaughter.” I guess once its been thawed the histamines will increase with age..
With the research I’ve done, processed meats have more chance of triggering histamine reactions… (in humans).
One study found that the histamine level in meat can change based on the cooking method. For most meat, boiling decreases the level of histamine, and grilling increases it.
There are also probiotic strains that aren’t ideal.. there are some histamine producers and others that are distamine degraders.
Now, in saying all of this, one could say it comes down to how many histamines receptors are in the gut.(?)
I’ve also been reading up on other canine nutritionists posts on histamines, (not TCM)…
All these perspectives have been interesting.
While I think of it, have you written about preparing seeds.. like soaking them first?
Thank you for another great post btw
I also have been trying to learn more as I have these probs and I believe my american bulldog dog def does as well. Interesting what u said about meats and I def will dive into this a bit more so I thank u for this knowledge!