This black discoloration is not due to dirt. Both whiteheads and blackheads may stay in the skin for a long time. The exact cause of acne is unknown, but doctors believe it results from several related factors. One important factor is rising hormone levels. Another factor is heredity or genetics.
Researchers believe that the tendency to develop acne can be inherited from parents.
For example, studies have shown that many school-age boys with acne have a family history of the disorder. Factors that can contribute to acne or make it worse Several factors can contribute to the cause of acne or make it worse. Changing hormone levels in girls and women may cause a flare in their acne 2 to 7 days before their menstrual period starts. Hormonal changes related to pregnancy or starting or stopping birth control pills can also cause acne. Stress, particularly severe or prolonged emotional tension, may aggravate the disorder.