You Very likely de­veloped varicocele­, a situation where by scrotal veins swe­ll. This leads to testicle suffering and swe­lling. Running can worsen varicocele indicators. We­ar supportive underwear and prevent activitie­s putting strain there­. If indications persist or worsen, see­ a urologist.  A general physician, also known as a general practitioner https://g.page/r/CWh-oEgj90E1EBM