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.
The eucalyptus tree is a genus of flowering trees and shrubs in the myrtle family, Myrtaceae, common in Australia, to which it is native. There are over 700 species of Eucalyp â¦ tus, and beside Australia, around 15 species are found in their native state in parts of New Guinea and Indonesia.he eucalyptus tree is a genus of flowering trees and shrubs in the myrtle family, Myrtaceae, common in Australia, to which it is native. There are over 700 species of Eucalyp â¦ tus, and beside Australia, around 15 species are found in their native state in parts of New Guinea and Indonesia.