Cluster headaches:

A cluster headache is one-sided head
pain that may involve tearing of the
eyes and a stuffy nose. The
headaches occur repeatedly every day
at the same time for several weeks and
then go away.

Cluster headaches are much rarer and
are the most severe form of primary
headache. They are usually
accompanied by a runny nose, tearing
of the eyes and sweating on the same
side of the head as the headache.
Cluster headaches last from 15
minutes to three hours and occur in a
pattern or "cluster" for up to several

You breathe a high flow of pure
oxygen through a mask for about 15
minutes, up to five times a day.
A large new study offers the best
evidence to date backing the use of
high-flow oxygen treatment for cluster
headaches. Researchers found 78%
of people who received oxygen
treatment reported being pain-free or
having adequate pain relief within 15
minutes of treatment.
Oxygen treatment for cluster
headaches is already a part of
accepted treatment guidelines, but its
use has been limited by a lack of
high-quality studies supporting its

is a new treatment for cluster
headaches. It is used to treat
headaches that are difficult to manage
with medication.
ONS involves implanting electrodes, an
impulse generator and connecting
wires under the skin. The electrodes
are implanted near the occipital nerve
at the base of the head and the
impulse generator is implanted
somewhere else in the body.
The implanted  electrodes are  the size
of a grain of rice at the base of the
head to stimulate the occipital nerve,
which runs from the skull base to the
spine and is part of the nerve circuit
which conducts the pain.
When the patient presses a remote
control, the electrodes transmit
electrical impulses to the parts of the
brain that produce headaches. This
re-programmes these areas not to
cause pain.

Similar research is under way using an
implanted stimulator in the
hypothalamus, the area of the brain
associated with the timing of cluster
periods. Deep brain stimulation of the
hypothalamus may provide relief for
people with severe, chronic cluster