It is not very easy to answer this question with a simple No or Yes. There is a popular misconception that greasy junk food may cause grease on the face and acne conditions. But there are still others that feel that junk food does not necessarily increase the oil produced on your face, unless you rub them on your face. So consuming occasional oil rich junk foods like cookies, pizza or potato chips is fine, provided you otherwise eat a healthy and balanced diet. However this could not be a general rule as some people are very sensitive to certain produced foods and could have breakouts of acne.