Anxiety is a psychological and physiological state characterized by somatic, emotional, cognitive and behavioral components

In the absence or presence of psychological stress, anxiety can create overwhelming feelings of fear, worry and dread. Anxiety is considered a “normal” reaction to a stressful situation. When anxiety becomes excessive, it can be classified as "anxiety disorder".

Anxiety is a condition that can often occur without an identifiable stimulus. As such, it is distinguished from fear, which is an emotional response to perceived threats. Additionally, fear is linked to specific flight and avoidance behaviors, while anxiety is linked to situations perceived to be uncontrollable or unavoidable. An alternative view defines anxiety as "a future-oriented state of mind in which the individual expects to receive negative responses" which suggests that it is a distinction between future dangers and dangers. present that establishes the difference between anxiety and fear.

The physical effects of anxiety can include palpitations of the heart, muscle weakness and tension, fatigue, nausea, chest pain, dyspnea, abdominal pain, or headache. The body prepares for fear: blood pressure and heart rate increase, sweat, blood flow to muscles increases, and immune and digestive system functions decrease (fight-flight response). External signs of anxiety may include pale skin, sweating, tremors, and dilation of the pupil. An individual experiencing anxiety may also experience avoidance or panic. While not all panic fears affect everyone with anxiety, there are some common symptoms. Panic fears usually arise without warning, and although this fear is often irrational, the perception of danger is real. A person affected by the fear of panic will often feel as if they are going to die or put themselves in danger.

Anxiety does not only include physical effects but also emotional effects. These include "feelings of apprehension or threat, disturbed concentration, tension and nervousness, anticipation of the worst, irritability, restlessness, observing (and waiting) for signs (and actions) of danger." , and a feeling of unease ”9 as well as“ nightmares / bad dreams, obsessions with sensations, feelings of déjà vu, and a feeling and perception that everything is scary The cognitive effects of anxiety can include thoughts of danger suspected, such as fear of dying

Several companies have studied the negative effects of anxiety and have designed formulas that can help restore calm and serenity.