Anxiety represents the body's natural reaction to a potential threat. When we find ourselves in a potentially dangerous situation, we first feel afraid. The fear unleashes a biological stimulus that leads to the secretion of adrenaline. Adrenaline is a hormone that alerts the entire body and prepares it to fight or defend itself when it faces the danger.We become more concerned, the heart beats faster and the blood pressure grows.

Anxiety becomes a problem when it is too intense or lasts too long by comparison with the reason that triggered it. The changes produced in our body by adrenaline are inadequate and persistent, becoming specific symptoms of anxiety, a disease that disrupt our lives by its simple presence or affects the way we act in the most important areas of live: family, school/work, social relationships.

The situations in which anxiety appears and disturbs things are others than the dangers exemplified above. These situations are responsible for stress, for our vulnerability and wickness and for the abilities we loose without knowing why. In the childhood, stress is more related to the academic performance and emotional relationships, and later to the workplace, bills payment and worries that are connected to the family.

Anxiety takes several forms, but the common denominator remains the fear and the body reactions that are produced by adrenaline. Fear manifests itself in multiple ways:

1. Panic disorder is characterized by repeated panic attacks.

2. Specific phobia is defined by an excessive concern manifested in the presence of a certain object or when we are facing a special situation.( animals, insects, heights, flying, going to the dentist, injection, blood view, tight spaces, etc.).. Person recognizes that fear is exaggerated or unreasonable, and the tendency is to avoid that situation or object.

3. Social phobia is often confused with shyness or excessive sensitivity.It is defined by a marked and persistent fear in social situations or in which personal performance matters, as the person is judge by others.The above situations are avoided or endured with great difficulties, even if the person recognizes that fear is exaggerated or unreasonable. Effects on social relationships, the benefits or professional school are significant.

4. Agoraphobia is defined as fear of open spaces but it extends, in fact, on any place outside the house or the area that a person considers safe: transport, markets,large shops, bridges, any place where the individual would have difficulties to come if something bad happens.

5. Generalized anxious disorder is characterized by excessive fear and worry about various events or activities (work or school performance).Associated symptoms are permanent anxiety, concentration difficulties, fatigue, irritability, muscle tension and sleeping problems. At least three of these symptoms occur in generalized anxious disorder.

6. Obsessive-compulsive disorder has a spacial status, as the patient is being concerned throw the content of thoughts or mental images that are repetitive (obsession) and repetitive behaviors (compulsions) resorting to. In general, thoughts obsession express fear of a person. Fear that may come to mind several times a day.

7. Acute stress disorder can occur to people who were involved or witnessed a traumatic event which resulted in death or serious injury to themselves or others. Living this moment was marked by intense fear, helplessness or horror along with the feeling of non-reality, or even amnesia deployment event.

8. Post traumatic stress disorder is similar to the acute stress disorder.The symptoms of this disorder can occur at six months away from the traumatic event.

9. Anxious disorder due to medical conditions include a marked and persistent anxiety, panic attacks or obsessive-compulsive symptoms due to a certain medical condition.

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