However, an invention by the American Academy of Dermatology, warned of the dangers of some types of Henna. Natural henna is made from plants and are usually harmless. And black Henna is usually faster dry and durable, light brown color of henna, it turns out using chemicals or PPD papaphenylenediamine. PPD will cause allergies in some people.
Research on the dangers of black Hena is also strengthened by other findings by a physician at the Dermatology Center, Buxtehude, Germany, Dr. Bjorn Hausen. In this discovery, he found that henna containing PPD can cause swelling of the skin, irritation and itching of the skin.
Allergies are caused by black henna is not severe, only the affected skin Henna will experience allergy symptoms. This allergic reaction will disappear after a few weeks. And if you are allergic to black henna, you must be careful to use some hair products, and drugs for diabetes, blood pressure and heart disease.
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