what is acne ?/  एक्ने क्या है ? A rashes mainly on faces, due to blockage and inflammation of glands in the skin. there are  various  types of acne the most common is acne vulgaris. sites of acne  trunk  arms  legs and  buttocks Acne is  common in teengae but can happens even as an infants and any age it mainly caused by hormonal disturbance that stimulated oil gland  to release it  more. causes of acne  firstly when the pores of skin becomes clogged due to excessive secrtion of oil gland as its primarily function is to moist the skin , but when this pores are blocked it accumulates dirt debris and bacteria, the blockage is termed plug. its top is white head hard or black head. when it ruptures the substance or matter inside oil,debris or bacteria can spread to surroundings area and cause inflammatory reaction. if the inflammation is deep in your skin the pimples may enlarge to form firm painful cysts.  hormonal changes is triggered by menstrual period pregnancy  birth control pills