Allergic reactions can be experienced by some people, while others do not produce the same reaction. Each is different based on its own immune system. In general, allergies are the abnormal response of the human immune to a substance, which is considered dangerous when in fact it is not. For example cold temperatures, dust, flower powder, and some other things that for normal people are harmless.
These allergic triggers are called allergens. Generally, humans will experience allergic reactions such as itching, shortness of breath, swelling, even to death if their bodies exposed to allergens.
There are 6 kinds of allergens that most often be the trigger of allergies in humans. Here’s the explanation as reported by HealthLine page =
- Air or temperature allergy.
The allergy occurs when the temperature is too cold or humid. Mast cells in the body will produce a compound called histamine, which triggers the emergence of various reactions in the body such as swelling, itching, shortness of breath, and others. Antibodies cannot withstand such temperature conditions resulting in an allergic reaction.
- Allergies of certain animals.
Usually, animals such as cats and dogs that become allergens, caused by the fur. There are also allergic to insects and lice that cause reactions such as itching, sneezing, shortness of breath, and rash on the surface of the skin.
- Contact dermatitis.
It is an inflammation of the skin due to contact with certain substances, which triggers itching, rash, and redness. For example when the skin holds water, which results in red and itchy. Although not dangerous but very annoying.
Food allergies are also commonly experienced, and the effect can be seen in the skin, digestive organs, or swelling of the lips and face.
- Allergy to drugs.
This happens when a drug contains certain substances that are not acceptable to the immune system. The reactions can vary, ranging from mild symptoms such as rashes, itching or even blisters and itching on the skin surface.
Eczema triggers are often unknown, but sufferers generally have allergies to certain things.