Four years ago i tride these jelqing exercise only did them three times on the last day i felt a pull and had tingling at the bass for months. also can only achieve about a 70% erection. what could it?

Can harm yourself: Some of those exercises can harm you, depending on how vigorously you did them. If having symptoms or difficulty with erections now, please see a urologist.

Poss Jelking injury?: Jelking does not make sense. I don't believe any of the positive claims that to helps to increase penile size. Nothing increases penile size once puberty is complete. Am concerned that you nave ruptured some penile blood vessels which could explain why your erections are only at 70%. However advancing years + prostate surgery may also contribute to your ed.