That all depends on what caused the bleeding and what is damaged on you. If it might risk you losing your testicles or being sterile forever after or too late to repair what's injured. I'd go right away to urgent care, a Dr.s office, an emergency room or some professional care. you don't want to risk hurting or losing your balls and manhood and fertility for one night's delay. It won't be any easier or less expensive tomorrow if you wait. So, why risk it for no gain in waiting. Small cuts on scrotums can bleed and look bad. But if it doesn't quit bleeding in 30 minutes or if its cut through the skin and into your sack insides, or its swelled up really big, go right away and get help.