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.
Description. Eucalyptus, also known as gum tree, is part of the Myrtaceae family of evergreen trees and shrubs, which contains 32 genera, including over 600 plants.The Eucalyptus genus includes 284 species of plants that vary in size from small shrub to tree.ost species of eucalyptus shrubs are ideal for large landscapes, but should be kept small when planted along with other plants in beds or around your yard. Controlling the size of eucalyptus shrubs, when growing as a companion plant, is vital to the overall health of your garden.