Doctors do not know exactly what causes cluster headaches. They seem to be related to the body's sudden release of histamine (chemical in the body released during an allergic response) or serotonin (chemical made by nerve cells).
Eucalyptus is a tree. The dried leaves and oil are used to make medicine. Though eucalyptus is used medicinally for many purposes, there isnât enough scientific evidence so far to rate it as effective for any of them.Eucalyptus leaf is used for infections, fever, upset stomach, and to help loosen coughs.ucalyptus is a tree. The dried leaves and oil are used to make medicine. Though eucalyptus is used medicinally for many purposes, there isnât enough scientific evidence so far to rate it as effective for any of them.
Plant Description. There are many species of eucalyptus. Some are the size of an ornamental shrub, and some grow to be giant trees. The kind most often used as medicine is called blue gum or Australian fever tree.It can grow as high as 230 feet. Its 4 to 12 inch leaves are dark green and shiny.lant Description. There are many species of eucalyptus. Some are the size of an ornamental shrub, and some grow to be giant trees. The kind most often used as medicine is called blue gum or Australian fever tree.