{"id":8918,"date":"2021-08-27T16:19:00","date_gmt":"2021-08-27T23:19:00","guid":{"rendered":"https:\/\/entsalem.com\/?p=8918"},"modified":"2021-09-07T16:23:21","modified_gmt":"2021-09-07T23:23:21","slug":"allergies-why-do-they-develop","status":"publish","type":"post","link":"https:\/\/entsalem.com\/allergies-why-do-they-develop\/","title":{"rendered":"Allergies: Why Do They Develop?"},"content":{"rendered":"\n

If you have allergies, you may remember the first time you had a reaction, but do you know why it happened? Below we review how and why allergies<\/a> develop.<\/p>\n\n\n\n

Allergies Are on the Rise<\/h2>\n\n\n\n
\"A<\/figure><\/div>\n\n\n\n

An estimated 400 million individuals across the globe experience hay fever, and between 200 and 250 million experience food allergies. According to the World Health Organization<\/a>, \u201cThe prevalence of allergic diseases worldwide is rising dramatically in both developed and developing countries.\u201d<\/p>\n\n\n\n

It Starts with the Immune System<\/h2>\n\n\n\n

Our immune systems protect our bodies from infections, diseases and toxic substances. As molecules enter our bodies through the eyes, nose, mouth or skin, the immune system identifies them as either harmless or threatening.<\/p>\n\n\n\n

If the body accepts the substance, the T cell is responsible, and it is known as a Type 1 immune response. If the body rejects the substance, it responds with a T helper type 2 cell, and it is known as a Type 2 immune response.<\/p>\n\n\n\n

Allergic Sensitization<\/h2>\n\n\n\n

Allergic sensitization occurs when the body is first exposed to an allergen<\/a> that produces a Type 2 response. It basically means that the body keeps a lasting memory of the substance, so when it comes into contact with it again, Immunoglobulin E antibodies cause the cells to release the inflammatory chemical histamine. Histamine is responsible for swelling, itching and mucus production.<\/p>\n\n\n\n

Types of Allergic Responses<\/h2>\n\n\n\n

There are several ways allergies can manifest, including:<\/p>\n\n\n\n