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

Hashimoto: symptoms and diagnosis - Diseases
Diseases

Hashimoto: symptoms and diagnosis

Symptoms Hashimoto's thyroiditis usually progresses to hypothyroidism (malfunction) by progressive destruction of the thyroid cells, but may in some cases (10%) be preceded by transient hyperthyroidism or maintain a sufficient thyroid hormone reserve for hypothyroidism is avoided. The main symptoms of hypothyroidism are: abnormal physical and psychic fatigue in the efforts of everyday life, drowsiness, recent nervousness, acquired constipation (to be differentiated from old disorders), unexplained moderate weight gain (sometimes contrasting with loss of appetite), damage to skin appendages
Read More
COPD: the symptoms - Diseases
Diseases

COPD: the symptoms

Symptoms of Chronic Obstructive Pulmonary Disease (COPD) are a fatty cough, especially in the morning; shortness of breath, especially during exercise, are the first signs that can occur. In total, the patient's daily life is likely to be very disturbed, with in particular: sleep disorders, chronic fatigue, anxiety
Read More
Angina pectoris (angina): Treatments - Diseases
Diseases

Angina pectoris (angina): Treatments

The treatment of angina pectoris can be done through medications or by an operation of dilation of one or more coronary arteries (angioplasty). In all cases, patient involvement is essential. Indeed, angina is a chronic disease that can worsen to cause myocardial infarction. Treatment must therefore include the reduction of risk factors for atheroma: eating well, stopping smoking and limiting alcohol consumption
Read More
Rosacea: the symptoms - Diseases
Diseases

Rosacea: the symptoms

Rosacea is manifested by certain symptoms: flushes and redness of the cheeks, nose, chin or forehead and, at a later stage, by pimples reminiscent of acne. The disease and its symptoms evolve in 4 phases: > At the age of 20-30 years old, it presents in the form of vasomotor flushes, that is to say, flush-like flushes at the cheekbones, nose, chin and forehead and neck
Read More