Nickel allergy is a very common allergic form. Symptoms of nickel allergy vary from person to person based on the level (degree) of nickel intolerance and can be very different. In addition, the symptoms of nickel allergy are accentuated especially during the summer and in areas where the climate is hot-humid: perspiration promotes the release of nickel in the skin.
Most common symptoms of nickel allergy: Contact dermatites
The most common and most common symptoms of nickel allergy are those of contact dermatitis: diffuse pruritus, small vesicles, urticaria and desquamation. In these cases the nickel allergy manifests itself with all the typical symptoms of contact dermatitis caused by nickel. The areas of the body most affected by nickel contact dermatitis are: hands, face, arms and legs.
Other symptoms of nickel allergy: Asthma, gastritis, colitis
Contact dermatitis is not the only symptom of nickel allergy; in some cases nickel allergy causes respiratory symptoms such as asthma and disorders affecting the gastrointestinal system (gastritis and chronic colitis).
The patch test for nickel allergy diagnosis
A skin test (patch test) is used for the diagnosis of nickel allergy: a patch containing slow release nickel is placed on the skin (usually on the upper part of the back or on the outer upper part of the arm). When the patch is removed, if an area with small blisters appears, the patch test response is positive: the subject is allergic to nickel.
Objects that can contain nickel
Nickel allergy is a very insidious allergic form because nickel is contained in many commonly used objects:
- Zippers and metal buttons of clothing
- Glasses, costume jewelry, watches, and tags
- Coins, keys, lighters, paperweights
- Door hangers, metal chairs, umbrella handles
- Kitchen utensils, sinks, needles, scissors and thimbles
- Hair dyes, liquids for the permanent.
Table of foods containing nickel
Nickel food and intolerance in addition to everyday objects, many foods contain small amounts of nickel and can cause or aggravate nickel allergy, just like food intolerance. Below is the general table of foods with nickel:
Vegetables containing nickel:
- Mushrooms 0.02 mg / kg of Nickel Concentration
- Carrots 0.04 mg / kg of Nickel Concentration
- Asparagus 0.4 mg / kg of Nickel Concentration
- Lettuce 0.3 mg / kg of Nickel Concentration
- Cabbage 0.03 – 1 mg / kg of Nickel Concentration
- Broccoli 0.03 mg / kg of Nickel Concentration
- Spinach 0.2 mg / kg of Nickel Concentration
- Tomatoes 0.09 mg / kg of Nickel Concentration
Legumes containing nickel:
- Beans 1.4 mg / kg of Nickel Concentration
- Peas 0.3 mg / kg of Nickel Concentration
- Lentils 1.9 mg / kg of Nickel Concentration
Fruit containing nickel:
- Pears both fresh and cooked 0.1 mg / kg of Nickel Concentration
- Grapes 0.1 mg / kg of Nickel Concentration
Fish containing nickel:
- Oysters 0.6 mg / kg of Nickel Concentration
Other food containing nickel:
- Chicken eggs 0.03 mg / kg of Nickel Concentration
- Cocoa 10 mg / kg of Nickel Concentration
- Liquorice 4.4 mg / kg of Nickel Concentration
- Hazelnuts 1.5 mg / kg of Nickel Concentration
- Peanuts 2.9 mg / kg of Nickel Concentration
- Margarine 0.2 – 4 mg / kg of Nickel Concentration
- Maize 0.4 mg / kg of Nickel Concentration
- Whole Wheat Flour 0.2 mg / kg of Nickel Concentration
- Powdered yeast
- Wine 0.01 mg / kg of Nickel Concentration
- The 0.03 – 1 mg / kg of Nickel Concentration
Nickel and diet intolerance: General diagram
In the presence of contact dermatitis caused by nickel allergy, a specific diet should be followed in the diet, avoiding foods with a high concentration of nickel. It is also important NOT TO USE the aluminum and Teflon coated cookware to cook if you are nickel-coated. On the other hand, 100% stainless steel pots and pyrex glass pans are permitted.
Here are the general indications of the diet for those suffering from nickel intolerance.
Food not allowed (to be avoided) in nickel allergy cases:
- All canned foods
- Asparagus, mushrooms, onions, spinach, tomatoes, legumes (beans, chickpeas, beans, lentils, peas, soy)
- Lettuce and carrots
- Whole wheat flour and cornmeal
- Pears, prunes, raisins
- Hazelnuts, almonds and peanuts
- Tea and cocoa
- Chemical yeast
- Herring and oysters
Food allowed in small quantities in nickel allergy cases:
- Cauliflower, cabbage, cucumber
- Polished rice, 00 flour
- Fruit (except pears, plums and raisins)
- Jam (as long as homemade)
- Olive oil
Foods allowed in quantities free in nickel allergy cases:
- All meat
- Fish (except herring and oysters)
- Milk and derivatives (butter, cheese, yogurt)
Care of nickel allergy: The personalized diet
The degree of nickel intolerance varies from one person to another, so the symptoms of nickel allergy may in some cases occur if the person comes in contact with very small doses of nickel, in other cases, however, to trigger the allergy, more significant quantities of nickel are needed.
It is therefore always recommended to perform the test to check the level of nickel allergy and to establish with the doctor the most suitable diet regimen for the individual case.