Ahh yes, pole kisses. Weirdly, bruises are trophy marks for aerialists, they are proof of hours of dedication and tenacity. Bruising is caused from putting intense pressure or friction on a soft area of skin. Some people bruise very easily, others not at all. Pay attention during class to the teacher explaining contact points on the apparatus and proper form for whatever move you may be doing, this will help you place your body correctly and prevent excess pressure in certain areas. To help your bruises heal, you can ice the area, use over the counter topical treatments like those with arnica (such as arnicare), or let time run its’ course.