Excess histamine in the body may cause symptoms including flushing, hives or wheezing; itching or burning of skin, eyes or mucous membranes; runny eyes or nose; and stomach cramps or diarrhea, according to Allergy & Immu... More »

Avoiding contact with known allergy triggers such as pollen, dust, mold spores and animal dander is an important first step in the treatment of having too much histamine, Mayo Clinic states. Taking an antihistamine drug ... More »

www.reference.com Health Medical Ranges & Levels

Too much calcium often causes mild side effects, such as belching and gas, according to WebMD. In severe cases of calcium overdose, a call to a poison control center or an emergency room visit is required, according to M... More »

www.reference.com Health Nutrition & Diets Nutritional Amounts & Limits

Chocolate allergy symptoms include abdominal upset, stuffy nose, watery eyes, migraines, hives and lightheadedness, according to HowStuffWorks. Symptoms can also manifest as swelling in the mouth, vomiting, diarrhea, sne... More »

www.reference.com Health Conditions & Diseases Allergies

Symptoms of a shellfish allergy can include hives, itching of the skin, abdominal pain, diarrhea and a tingling in the mouth, according to Mayo Clinic. For severely allergic individuals, symptoms can also include swellin... More »

Symptoms of histamine intolerance include nausea, hives, headaches, hypertension and changes in heart rate, according to mindbodygreen. Histamine intolerance may cause a runny nose or itchy tongue after eating eggplants,... More »

www.reference.com Health Conditions & Diseases Allergies

According to WebMD, mild or severe symptoms of lactose intolerance occur 30 minutes to 2 hours after ingesting milk or dairy products, and the most common side effects from a lactose intolerance are bloating, stomach cra... More »