Allergies are simply a sensitivity to a substance. When you eat, touch, or inhale a substance, your body overreacts; the substance that causes the reaction is called an "allergen". Under normal circumstances, the body produces antibodies to protect it from disease; however, the body of an allergic person mistakes a normally harmless substance for something harmful and produces antibodies to the substance, which becomes an "allergen". This allergic reaction can lead to physical problems that would not normally occur in a normal person.

Allergy - causes

1, the causes of skin allergies include internal factors, external factors in two aspects:

A, the internal factors is its own allergic body, which plays a leading role in the development of skin allergies. Early and complete desensitization is the key to treating skin allergies and preventing recurrence.

B, external factors are also many. Including diet, inhalants, climate, contact allergens factors. Among them, seafood, protein, spicy food, wine, inhalation of pollen, dust mites, cold weather, contact with chemicals, soaps, detergents, etc. are the most common triggers of skin allergies. Due to such complexity, skin allergies are made to recur due to the intertwining of numerous causes and triggers.

2, common allergens are as follows: A, inhalant allergies: such as pollen, willow, dust, mites, animal dander, fumes, paint, car exhaust, gas, cigarettes, etc. B, ingested allergies: such as milk, eggs, fish, shrimp, beef and mutton, seafood, animal fat, alloys of proteins, alcohol, drugs, antimicrobials, anti-inflammatory drugs, perfumed oils, flavoring, onions, ginger, garlic and some vegetables. fruits, C, contact allergens: such as cold air, hot air, ultraviolet rays, radiation, cosmetics, shampoo, detergent, hair dye, soap, chemical fiber supplies, plastic, metal jewelry (watches, necklaces, rings, earrings), bacteria, mold, viruses, parasites, etc. D, injectable allergens: such as penicillin, streptomycin, xenograft serums, etc. E, their own tissues antigens: mental stress, work pressure E. Self-tissue antigens: mental stress, work pressure, microbial infection, ionizing radiation, burns and other biological, physical and chemical factors that change the structure or composition of the self-tissue antigens, as well as their own hidden antigens released as a result of trauma or infection, can also become allergens.

3, allergies manifested by the symptoms: skin (allergies, hives, eczema, dermatitis, sunburn, psoriasis, itchy skin, blushing, red blood) nose or respiratory tract (rhinitis, cough, bronchitis, asthma, conjunctivitis, pharyngitis, hay fever) joints (rheumatism, arthritis, gout) gastrointestinal (gastritis, enteritis, ulcers, hemorrhage) common allergies Fava bean allergy (aka broad bean disease) ) Sufferers lack a 6--phosphoglucose dehydrogenase enzyme in their bodies, and eating fava beans causes red blood cells in the blood to break down, causing allergies. Pasta allergy, also known as gluten-sensitive enteritis, develops when some people react to the maltolysin protein within the gluten in food. Garlic allergy, also known as porphyria, occurs when a compound called dihydroxydisulfide in garlic exacerbates metabolic abnormalities in people with defective porphyrin metabolism, interfering with heme metabolism and triggering the onset of the disease. Proteinosis is caused by a component of protein called phenylalanine. Some people are born lacking phenylalanine hydroxylase, which cannot convert phenylalanine into black color, resulting in albinism. The accumulation of phenylalanine in the body affects brain function and epilepsy occurs. People who are allergic to cow's milk lack a galactose-1-phosphorothiuridylyltransferase, which cannot break down the galactose in milk; the accumulation of galactose will produce toxicity, affecting the whole body. Allergy to vegetables is due to the lack of phytanic acid hydrolase in the body, can not properly utilize the phytanic acid in green food, and the accumulation of phytanic acid will cause poisoning. Mushroom allergy is due to the lack of a serum copper oxidase in the body, can not get rid of the copper in the food out of the body, resulting in toxic allergies.

Toxic allergy.