Acne Vulgaris

Acne Vulgaris is a common skin disease that affects approximately 40-50 million people in the United States,
according to the american Academy of Dermatology. 

Acne occurs most frequently during childhood and adolescence (affecting 80-85% of all adolescents)
but it may also appear in some individual adults.
   
Acne patients suffer from the appearance of lesions on areas of the body with a large concentration of oil glands, such as the face, chest, neck and back. These lesions can be inflamed (papules, pustules, nodules) and non-inflamed (comedones).
Acne has a profound effect on patients' quality of life: the appearance of lesions may cause psychological disorders such as depression, anxiety and lowered self-esteem of the patient. 
Also, acne lesions may cause permanent scarring.
 
There are four major factors that contribute to the emergence of acne lesions: 
  •  Stimulated sebaceous gland, resulting in excess production of sebum. 
  •  Blockage of hair follicles due to abnormal keratinization.
  •  Proliferation of Propionibacterium acnes (P. acnes) within the clogged hair follicles.
  •  Inflammatory response by a variety of immune cell types.

Acne may be also triggered by factors like stress, excessive sweating, use of oily cosmetic 
products and diet.