no it's not caused by bacteria Allergies are an immune system response to some sort of external stimulus, typically specific types of airborne particles in the case of respiratory allergies. Seasonal allergies tend to be caused by sensitivity to some form of plant life, which bloom (and thus, produce airborne particles) only a limited time each year.
No, they are caused by "allergens".
One can have many physical symptoms caused by allergies, including congestion, itchy eyes and inflamed skin. Nausea and breathing difficulties are also symptoms caused by allergies.
Some is hereditary, some is from the wear and tear from use, some is an allergic reaction to medication, some is from allergies to foods.
Nasal congestion can be caused by a common cold. It can also be caused by seasonal allergies and from dust, dirt, etc.
Not necessarily. They are two different metals with different properties.
Chronic hives are caused by some type of allergy. An allergist can do testing to determine what types of allergies you have.
Post-nasal drip from allergies and airborne irritants can cause sore throat. It can be caused by hay fever and other allergies that irritate the sinuses. Environmental and other conditions, such as heavy smoking or breathing secondhand smoke.
Egg allergies are caused by proteins found in the egg whites or yolks, such as ovomucoid, ovalbumin, and ovotransferrin. These proteins can trigger an immune response in some individuals, leading to allergic reactions.
piercings are a matter of personal taste
Allergies are not physical conditions. Most are caused by chemicals. The chemicals may be pollen or something else.
Some people are allergic because of the rubber and the material can be irritating. Allergies are an immune response and a protective mechanism to fight off bacteria. Allergies are caused by the immune system being hypersensitive. If you are allergic to silicone rubber, you may have other allergies as well.