I'm getting a very sharp/burning pain in my anus and testicle area right after a bowel movement, could this be a prostate issue? I'm only 23

Need more info... What you presented does suffice to deduce right answer. To possibly deduce correct diagnosis, one needs to analyze the detailed history of specifics, relevance, & sequence of events of present & possible prior symptoms + findings of physical exam + testing as needed. How to these properly? Follow instructions in http://formefirst.com/eNewsletter06.html; then you can work closely with doc for ...