Acne Spine with acne, the cause is the same. But what distinguishes it from the usual acne on the face is the use of a dual-dual clothes so that the sweat on the back of increased production and less air circulation as it is covered by the stacked clothes. This incident will further increase oil production if you're in the heat. This usually occurs during the dry season when everyone was avoiding the sun by covering all parts of his body. It would be very convenient if done in an air-conditioned, but if you indulge in the outdoors, you should avoid using too much clothing.