We walk into beauty supply stores and may grab the first thing that says it’ll moisturize a scalp, hydrate hair and make it grow. Some consumers will flip the container around to see how many ...

Some people may develop contact dermatitis (an allergic skin rash) or skin irritation where undiluted tea tree oil was used. Diluting tea tree oil is fairly simple: for every one to two drops of ...

Medically reviewed by William Truswell, MD Dandruff is a mild form of seborrheic dermatitis caused by an overgrowth of the yeast (fungus) Malassezia. It causes oiliness, dryness, white or yellow ...