Acne, the eternal problem Although acne affects almost all young people in the world, s and very little known about its causes and treatment. We know that factors such as diet, sunlight and the hygiene of the skin appear to be involved, but the evidence is not enough. There are many products that coexist as solution to Acne, but most of them, despite its high price, they do not have an effective result in according to that people. The main problem we have is that investigations are excasas, we have no studies comparing the effectiveness of different products.We know that it is a bacterium that causes infection and have a reaction on the facial surface. Why is it so difficult to create treatment to solve? Most of the answers to Acne are not well-founded views of experts, and no evidence to support these views, the possibility of conflicts of interest. We are as usual: how many products would disappear, be they cave, if created a pill that kills the bacteria and goodbye problem?This controversy has led to the national institutes of health in the United States.UU. consider therapy Acne as one of the 100 goals for the national investigation. Authors seek a rigorous and comparative research on the effectiveness of different treatments, an understanding of the specific types of acne as well as their triggers and treatments effective.