ANTIHISTAMINES – Allergies and Risk Factor (II)
However, it is important to know that the body there are three types of receptors (structures that receive a substance to produce a reaction) for histamine, which include:
H1. They relate to the immediate allergic response and the appearance of the following symptoms: runny nose, sneezing, itchy nose and throat and to a lesser degree, watery eyes, redness and swelling in eyes and a rash of rashes. Found in the hypothalamus (gland in the brain responsible for regulating hormone), neurons (nerve cells), blood vessels and certain regions of the brain.
H2. Involved in regulating the secretion of gastric juice and hydrochloric acid stomach.
H3. Are present in nerve endings and are responsible to self-regulate the release of histamine.
There exist several risk factors that may lead to the development of allergies, which include the following conditions:
- Family history, for when one or both parents have allergies will inherit a predisposition to their children.
- Exposure to environmental pollutants.
- Stay for long periods in places with poor ventilation.
- Living in a house with rugs and carpets that are not provided with proper maintenance (cleaning and disinfection).
- Living with animals.
- Suck tobacco smoke, dust or pollen.
To diagnose allergies the patient may be subjected to one or more of the following clinical studies:
Measurement of immunoglobulin E. Blood test that reveals the total amount of the antibody in the body when in contact with an allergen.
Skin tests. Consist of applying in the forearm or back different substances that can cause allergy, such as dust, mold, pollen, animal hair, cosmetics, metals, food and medicine. Those affected by this disease have redness, hives and itching 15 minutes later.
Patch testing. When practicing different substances are placed on the skin of the back, which are covered with patches for 48 or 72 hours later, we review in which regions of the epidermis was allergic response.