Considering the widespread use of copper in dentistry, medicine, industrial use, coinage and personal adornment, copper sensitivities are rare.

The most common skin rash from a food allergy that can appear on the hands and ankles is hives, according to MedlinePlus. Hives are welts that form within a matter of minutes after someone consumes a food he is allergic to.

Every child has glands in his nose and throat that produce mucus. Normally, this mucus doesn’t cause much of a problem, dripping unnoticed down the back of the throat and eventually making its way into the stomach.

The most effective way to build blood is to include iron, vitamin B-12 and folic acid-rich foods in your diet, according to "Acupuncture Today." Iron makes the main compound found in red blood cells, a protein called hemoglobin that carries oxygen in your blood. Vitamin B-12 and folic acid help produce red blood cells.

Almonds and other tree nuts are great sources of nutrients, but for some people they can also cause allergic reactions that range from a mild rash to severe breathing difficulties. Such reactions typically occur within minutes to 2 hours after eating.

Zyrtec, or cetirizine, is an antihistamine medication available over the counter to treat allergies and hives. In infants, Zyrtec is the only Food and Drug Administration-approved medication to treat perennial allergic rhinitis and chronic urticaria.

True allergy to cocoa is rare. Most likely an allergy to or intolerance of other ingredients in chocolate or chocolate desserts, such as soy or dairy, is causing symptoms. You might also be sensitive to the natural chemicals in chocolate.

If you develop a skin rash after eating shrimp, you are most likely experiencing a type of food allergy. Shellfish allergies are one of the most common food allergies. Shrimp are a type of shellfish, a marine animal with a shell.

Along with allergies to peanuts, celery allergies affect Americans more frequently than adverse reactions to other foods. Some people only have problems with celery at certain times of the year.

Kellogg’s Corn Flakes are not a good choice for someone on a gluten-free diet. In fact, Kellogg’s reported in the fall of 2010 that it does not make any cereal, waffle, cookie or cracker that is “suitable for consumers on a gluten-free diet.

Mold allergies are relatively common. A reaction occurs after inhaling tiny airborne spores or eating foods that contain mold. It can be difficult to avoid mold, since we’re all exposed to it in daily life.

According to the MayoClinic, food allergies affect 6 to 8 percent of children under 5 in the United States and 3 to 4 percent of adults. Food allergies can cause a range of symptoms from abdominal pain to hives.