Is Histamine to Blame for Your Headache, Hives and Heartburn?

By Dr. Mercola If you’ve ever had allergies with hives, nasal congestion, headaches or coughing, you may already know histamine, a chemical neurotransmitter your body produces, is what drives the most common allergy symptoms. However, in around 1 percent of the population, histamine overload may lead to symptoms such as constipation and/or diarrhea, migraines, rapid heartbeat and low blood pressure that are serious enough to cause discomfort, but vague enough for a doctor to have trouble diagnosing. Histamine intolerance is a disorder that causes a wide range of symptoms, and it’s often confused with a host of other ailments. Many doctors have never heard of this common but misunderstood condition and keep treating symptoms without understanding the actual cause. Whatever the trigger — everything from allergies and leaky gut to enzyme deficiency and high intake of histamine-rich foods can lead to high histamine levels — it’s no exaggeration to say histamine intolerance can m


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