This proceeds most usually either from too great a fulness of the vessels of the head, sometimes the result of disease of the heart, sometimes of debility, or may be symptomatic of Indigestion, Hypochondriasis, or Hysteria.

The patient is seized on a sudden with a swimming in the head, everything appears to him to be turning round, he staggers, and is in danger of falling down. After a few minutes perhaps, the feeling goes off, and he has no return of it.

When this complaint arises from Hysteria or any other nervous disease, it is attended with no danger, but when it is caused by too great a fulness of the vessels of the head, and is not relieved by proper evacuations, it may terminate in apoplexy or palsy.

Where giddiness prevails as a symptom of some nervous disease recourse must be had to the remedies recommended under the head of Hysteria. But where it is a consequence of a tendency of blood to the head, the patient should be cupped in the back of the neck, or have some leeches applied there. If the sensation of fulness and heaviness continues, notwithstanding the bleeding, the patient had better have a seton or an issue inserted in the back of the neck.