Acne, an embarrassing skin problem characterized by whiteheads, blackheads, pimples, pustules and boils, affects between 40 million to 50 million Americans, according to the American Academy of Dermatology. While acne is a highly treatable disorder, the Acne Resource Center reports that only 11 percent of sufferers seek treatment. Although further clinical analysis is needed to confirm its efficacy, eucalyptus oil may prove beneficial in the battle to banish blemishes.

Indigenous to the Australian states of Tasmania, New South Wales and Victoria, eucalyptus trees, commonly called gum trees, grow to heights exceeding 300 feet. The spreading evergreen produces creamy white bark, large cream-colored flowers, green leaves and woody fruit. Rich in volatile oils that are used medicinally, the eucalyptus tree thrives in moist valleys of upland areas.

Australian Aborigines used eucalyptus oil therapeutically for generations. In fact, according to the book "Nature's Medicine" by Steven Foster, they were most likely the first people to recognize the healing properties of the tree's oil. In their herbal medicine tradition, Aborigines used the oil to heal wounds and fungal infections. The therapeutic value of eucalyptus oil spread to China, India and Western herbal and conventional medicine in the 19th century where it is still used today to treat headaches, coughs and colds.

Andrew Chevallier, medical herbalist and author of the book "Herbal Medicine," states that extensive clinical research into eucalyptus oil has shown it to possess potent antiseptic properties helpful in healing skin issues such as acne. When applied topically in diluted form to the skin, the oil helps dry up blemishes and pus-filled pimples. Eucalyptus oil also contains antibacterial qualities that help prevent acne outbreaks. According to Dr. C. Norman Shealy, author of the book "Healing Remedies," when outbreaks occur, the oil helps alleviate inflammation and reduces pain associated with acne boils.

To treat acne blemishes, blend one drop of eucalyptus oil with three drops of water. Dab a cotton swab into the solution and generously apply it on your pimples, paying special attention to oily areas. Avoid the eye, nose and mouth areas as well as any cracked or open skin.

According to the University of Maryland Medical Center, topical use of eucalyptus oil is nontoxic. However, because it can trigger asthma attacks, do not use the oil if you have asthma. Pregnant and lactating women should avoid eucalyptus oil. Never apply eucalyptus oil directly to the nostrils, as it is highly poisonous. The University of Michigan Health System strongly warns that internal use of eucalyptus oil has proven fatal. Seek immediate medical help if you accidentally swallow the oil.