Allergic reactions to hair dye are often caused by paraphenylenediamine (PPD), a chemical found in many dark-colored dyes, and symptoms can range from mild skin irritation to severe anaphylaxis. To ...

Medicare Part B may cover the costs of a purified protein derivative (PPD) test if your healthcare professional deems it necessary to diagnose tuberculosis (TB) due to existing symptoms. A PPD test ...

A hair dye allergy typically occurs due to chemicals in the dye. The most common cause of these allergic reactions is para-phenylenediamine (PPD). Immediate treatment is necessary. PPD is found in ...

Tuberculosis, or TB, is a disease that infects nearly 11 million people worldwide, killing some 1.25 million of them every year, per data from the World Health Organization. A person infected with the ...