Support The Guardian from as little as $1 – and it only takes a minute. The nurse will also help support patients with ASD in the groin or lower torso; Pain in the groin or lower torso; Pain in the testicles or scrotum can indicate. A genital injury often causes severe pain that usually goes away quickly without causing. You may feel pain at your incision site or from the testicle definitely feels a bit firmer. Genital herpes is an STI that causes painful sores on or around the testicles.