The allergic reaction occurs when some substances called allergens come in contact with:
- Respiratory tract,
- Gastrointestinal treatment.
Allergic reactions are common because many people suffer from allergy .
The immune response is similar to that which causes hay fever ( allergic rhinitis ).
Most allergic reactions occur soon after contact with the allergen:
- Many allergic reactions are mild ,
- Others can be serious and deadly .
They are usually limited to a small area of the body, but may involve the whole organism.
The most severe form is called anaphylaxis or anaphylactic shock .
A food intolerance is not the same thing as food allergies.
Allergies are a response of the immune system, while food intolerance is a response of the digestive system that can not properly decompose and digest food (the most common is lactose intolerance ).
There are many substances to which a person may be allergic, for example:
- Venom of bee stings ,
- Some foods,
Although early exposures may produce only a slight reaction, repeated contact may cause more severe symptoms.
When a person has been exposed to an allergen (has been sensitized), an additional exposure to the allergen (even if in very small amounts) can trigger a serious reaction.
- 1 Mechanism of allergic reaction
- 2 Types of allergic reactions
- 3 Symptoms of allergic reaction
- 4 Symptoms of a moderate or severe reaction may be:
- 5 Treatment for allergic reaction
- 6 Natural remedies against hives and mild allergic reactions
- 7 Diet and food against allergic reactions
After how long does the allergic reaction manifest?
A severe allergic reaction occurs within a few seconds or minutes of exposure to the allergen .
However, some reactions can occur after several hours , especially if the allergen is a food.
Anaphylaxis is a severe and sudden allergic reaction that occurs within minutes of exposure.
Without immediate treatment anaphylaxis can:
- Aggravate very quickly,
- Cause death in 15 minutes.
Mechanism of allergic reaction
The immune system includes the white blood cells that produce the antibodies.
- When the body is exposed to an antigen, a complex series of reactions begins.
White blood cells produce an antibody specific for the antigen in question.
This phenomenon is called ” sensitization “.
- The task of antibodies is to detect and help destroy the substances that cause the diseases.
In allergic reactions, the antibody is called immunoglobulin E or IgE .
This antibody stimulates the production and release of chemicals and hormones called “mediators”.
- The mediators produce local effects on tissues and organs, as well as call more white blood cells.
These effects cause the symptoms of allergic reaction.
- The histamine is one of the most important mediators produced by the body.
If the release of mediators is sudden or significant, the allergic reaction may be sudden and severe, and anaphylactic shock may also occur.
- Allergic reactions are unique to each person.
The reaction time to allergens can vary greatly. Some people have an allergic reaction right away, others need more time to develop it.
Types of allergic reactions
hypersensitivity Type I hypersensitivity is called immediate or anaphylactic hypersensitivity.
The local anaphylaxis reaction may involve:
- The skin ( urticaria and eczema ),
- Eyes ( conjunctivitis ),
- Nasopharynx (coryza, rhinitis),
- Bronchopulmonary tissues ( asthma ),
- Gastrointestinal treatment ( gastroenterite ).
The reaction may start from a few minutes to up to 2-4 hours after exposure to the antigen.
hypersensitivity Type II (or cytotoxic) hypersensitivity may affect different organs and tissues. Generally antigens are endogenous, although exogenous chemicals (haptens) may cause this reaction.
Examples of this reaction include:
- A granulocitopenia,
- A thrombocytopenia .
This reaction may occur in case of:
- Blood transfusions with an incompatible blood type,
- Hemolytic anemia of the newborn due to incompatibility of Rh factor (blood antigen) of maternal and fetal blood,
- Hemolytic anemia caused by medications.
hypersensitivity Hypersensitivity type III (immune complex mediated hypersensitivity).
Immune complexes are formed by an antigen and the corresponding antibody.
When they are very numerous, the body can not eliminate them.
The immune complexes deposit in the tissues and provoke an inflammatory reaction.
The reaction may be general / systemic (eg, serum sickness) or may affect only individual organs , for example:
- Skin ( lupus ),
- Kidneys ( Lupus Nephritis ),
- Lungs (aspergillosis),
- Blood vessels (vasculitis, such as cryoglobulinemic vasculitis ),
- Joints ( rheumatoid arthritis ).
hypersensitivity Type IV (or delayed or cell-mediated) type hypersensitivity may occur with a severe delay, even 48-72 hours after antigen injection.
The reaction is characterized by:
- Hardening of the skin.
Contact dermatitis is a common example of a delayed hypersensitivity reaction.
Delayed hypersensitivity reactions also occur in:
- Patients with tuberculosis (TB),
- Viral infections of the liver,
- Transplant rejection.
Symptoms of allergic reaction
Among the most common symptoms of a mild allergic reaction are:
- Urticaria (especially on the face and above the neck)
- Itchy skin
- Nasal congestion and allergic rhinitis
- Pimples and rashes
- Red eyes
- Excessive tearing .
Symptoms of a moderate or severe reaction may be:
- Belly pain and abdominal cramps
- Abnormal sounds emitted during breathing
- Chest pain or tightness
- Difficulty breathing
- Difficulty swallowing
- Redness on face
- Nausea or vomiting
- Swollen face, tongue and eyes
- Breathing breath .
How long does the allergic reaction last?
Urticaria and mild allergic reactions usually go without medication and last for 10 minutes to several days.
Treatment for allergic reaction
- The only way to not have an allergic reaction is to avoid the elements that cause the signs and symptoms.
- For a mild allergic reaction, over – the – counter or prescription antihistaminesmay reduce symptoms.
These medications can be taken after exposure to an allergen to help relieve the itching or hives that the allergy causes.
- For a severe allergic reaction, an epinephrine (adrenaline) injection may be required.
Why is cortisone used against allergic reaction?
- Accumulation of liquid.
Cortisone is useful for reducing the symptoms of allergic reactions and can be administered in the form of:
For example, in case of allergic rhinitis doctors often prescribe 1 mg of Celestamine (oral cortisone) per day for a week.
Natural remedies against hives and mild allergic reactions
The sodium bicarbonate is a substance which can reduce symptoms.
The oatmeal is very useful to provide relief to irritated skin.
You need to fill the tub and pour a pound of baking soda.
Add a glass of oatmeal to the water.
Get into the tub and stay in the water for at least 10/15 minutes.
Diet and food against allergic reactions
Natural therapies treat allergic reactions especially with changing diet, but also through improving lifestyle.
According to hygienism (natural life theory), the substances cause allergies only in people with a significant accumulation of toxins in the blood.
In fact, after changing the diet, the body no longer has allergic reactions , even if the person comes in contact with grasses, latex, etc.
It is not easy to change eating habits, but we should not underestimate the negative effect of food.
According to the hygienist Shelton, the patient will no longer suffer from allergy if he stops eating:
- Animal proteins (meat, fish, eggs, dairy products),
- Processed foods and condiments.
A blood type diet is a type of natural food that must be different according to the person’s blood type.
A person’s immune system can cause symptoms and illness when it comes in contact with certain foods.
A food can be:
- Harmful to people of a blood group,
- Harmless to others.
Unlike the vegan diet recommended by hygienism, this type of food is based on animal and vegetable proteins.
According to the blood type diet, all people suffering from allergies should avoid:
- Cereals (from the grass family),
- Milk and dairy products,
The recommended foods are:
- Vegetables: Almost all are adequate, but some people have problems when eating tomatoes.
- Fruits in shell.
Avoid fried foods.