The people over at ** and** have seemed to come to the conclusion that this is a Pelvic Floor area muscular issue and not related to nerve damage at all but rather contracted muscles compressing nerves.

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It seems that physical therapy is the only real cure for this.

If it is indeed tissue/bloodvessel/ or nerve damage in the penis then I guess only time, rest, and rehab can heal that. But many have gone years without much improvement. Pelvic floor and trigger point physical therapy so far has a better track record.