Every time i masturbate i am getting acne like something a bit bigger than pimples. all the time yellow flum like thing comes out of it. reasons?

Where?: Not knowing where the sores are occurring, there could be different reasons. If the sores are occurring on the genitals, then it may be a factor of making sure the area and hands or tools used are clean and that you are using a proper lubricant to reduce irritation. It may be a reaction to the lubricant being used. If they continue, you should get it evaluated for possible medical treatment.