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.
Knowledge center. Eucalyptus is a fast growing evergreen tree native to Australia. There are over 400 different species of the tree. Eucalyptus Globulus (also known as Blue Gum) is the main source of global eucalyptus oil production.Eucalyptus oil comes from the dried leaves of the eucalyptus tree.The oil is a colorless liquid with a strong woody and sweet scent. Eucalyptus leaves are steam-distilled to extract the oil.here are over 400 different species of the tree. Eucalyptus Globulus (also known as Blue Gum) is the main source of global eucalyptus oil production. Eucalyptus oil comes from the dried leaves of the eucalyptus tree. The oil is a colorless liquid with a strong woody and sweet scent.