Anxiety is most often caused by the stressful factors we all have to live with. Consequently events such as the death of a loved-one or the breakdown of a personal relationship can cause anxiety, as can pressures at work, school or relationships. Most of all, financial problems, worries about our personal safety, and that of our loved-ones, are also major reason what causes of anxiety.
Also, anxiety can also be caused by medical factors, such as a reaction to medication, the worry of serious illness or the symptoms of some illnesses. Substance abuse can also what causes anxiety. Alcohol and benzodiazepine dependence are major causes of anxiety, as are cocaine or amphetamine use or the withdrawal from drugs, either illicit or prescription.
Furthermore, genetics can also play a part. It has been suggested by some researchers that a family history of anxiety increases the likelihood that a person may suffer from it. There is also thought to be a connection between the levels of certain types of neurotransmitters in the brain and the possibility that a person will develop the condition.