Anxiety can be one of a number of symptoms as a reaction to stressful situations. There are three common types of reaction disorders:
Acute reaction to stress (sometimes called acute stress reaction)
Acute means the symptoms develop quickly, over minutes or hours, reacting to the stressful event. Acute reactions to stress typically occur after an unexpected life crisis such as an accident, bereavement, family problem, bad news, etc. Sometimes symptoms occur before a known situation which is difficult. This is called situational anxiety. For example, before an examination, an important race, a concert performance, etc.
Symptoms usually settle fairly quickly, but can sometimes last for several days or weeks. Apart from anxiety, other symptoms include: low mood, irritability, emotional ups and downs, poor sleep, poor concentration, wanting to be alone.