Diseases

Allergies: the causes

The causes of allergies are becoming better known. Different biological mediators intervene in the process of an allergy. And at the end of the chain of biological events, cells secrete a large amount of the histamine that causes the allergic reaction.

Allergy is a disproportionate response of our body to a normally harmless external agent (pollen, cat hair, strawberries ...).

In order for the allergic reaction to occur, the organism must first have been in contact with the offending substance, called an allergen, by the respiratory, food or cutaneous route. Following this contact, the body makes specific antibodies against the allergen, this is the awareness phase. It can last several years.

It is unclear why the body makes antibodies against this or that allergen. It is certain that genetic factors play an important role but our way of life also if we believe the strong growth of allergic phenomena.

After this latency period, if the body is again in contact with the same agent, the antibodies react and the allergic reaction is triggered sometimes immediately or delayed, it can take various forms: rhinitis, conjunctivitis, asthma, urticaria ...

True / False on the hikes

What is a respiratory allergy? At what age can we develop an allergy? Is it hereditary? Can we prevent an allergy? The essentials about allergies in 19 questions!

Want to react, share your experience or ask a question? See you in our FORUMS Allergy or A doctor answers you!

To read also our files on the various allergies:

> Milk allergy
> Lactose intolerance
> Mite allergy
> Pollen allergy

Popular Posts

Category Diseases, Next Article

Osteoarthritis of the knee: Sources and notes - Diseases
Diseases

Osteoarthritis of the knee: Sources and notes

> Essentials in rheumatology: the correct use of the drug, webzine, 2010. HAS. > Management of osteoarthritis: paracetamol as first-line treatment during painful crises, HAS, news and practices, n ° 57, March 2014. > Pen C et al. The socio-economic consequences of osteoarthritis in France. Study Coart France, Rev Rhum 2005; 72: 1326-30.
Read More
Wart: sources and notes - Diseases
Diseases

Wart: sources and notes

Author : Dr. Ada Picard. Sources : - Warts, French Society of Dermatology, dermato-info.fr. - Item 149 - Epithelial and melanotic skin tumors: human papillomavirus (HPV) tumors, College of Teachers in Dermatology of France.
Read More
Sleep apnea: the symptoms - Diseases
Diseases

Sleep apnea: the symptoms

The first symptom of sleep apnea is having poor sleep and daytime sleepiness that affects the patient's alertness. We must think of a sleep apnea syndrome in front of these other symptoms: a snorer who wants to sleep during the day, who is tired, his character is irritable, high blood pressure, memory and concentration problems are patents, he is depressed
Read More
Canker sores: The causes - Diseases
Diseases

Canker sores: The causes

The canker sores appear spontaneously, often as a result of an injury to an object or food (a crust of bread, a fishbone) or after biting the cheek. In addition, certain foods favor canker sores: certain cheeses, chocolate, nuts ... Aphthous ulcerations can also be promoted by stress, fever, or a lack of vitamin B, folic acid or iron
Read More