If it is an anxiety disorder on its own, the only reason for hospitalisation is for intensive treatment that can’t be carried out as an out-patient.
This is only necessary in the severest cases of OCD and related disorders. Such cases are very rare and treatments are conducted in highly specialised units, of which there are only a handful across the country.People with anxiety disorders commonly fear going mad – such fears are irrational; even the severest panic attacks can be treated effectively in the community.In patient care is reserved for the severest cases of psychotic disorders such as schizophrenia and severe depression.
Read more on nopanic.org.uk