Why do erections take so long to come back?
The nerves that trigger erections run in thin bundles right alongside the prostate. Even when a surgeon spares them, they are handled, stretched and sometimes bruised during the operation, and injured nerves recover slowly. The American Cancer Society notes that function can return gradually and that it can take from a few months to two or more years.
The erectile tissue itself also changes while the nerves heal. A biopsy study of 19 men who had normal erections before surgery found less smooth muscle and elastic tissue, and more collagen, at 2 months after prostatectomy, with further change at 12 months. The authors linked this progressive fibrosis to loss of nerve supply and reduced blood flow, and it helps explain why recovery is not just a matter of waiting for nerves.
What does the 12-to-24-month timeline look like?
Recovery happens over seasons, not weeks. The AUA guideline states that spontaneous erectile function usually recovers 12 to 24 months after surgery, and that recovery may still be possible as late as 36 months.
| Time after surgery | What is typical | Focus |
|---|---|---|
| First weeks | Healing; sexual activity on hold | Follow surgical instructions |
| First months | Few or no natural erections, especially firm ones | Treatment-assisted erections if your team agrees |
| 12 to 24 months | The main window for natural recovery | Track progress; adjust treatment |
| Up to 36 months | Later gains still possible for some men | Reassess before deciding the result is final |
How far you get depends on several factors. The AUA cites a recovery rate of about 60% with a bilateral nerve-sparing technique, and the American Cancer Society notes that younger men are less likely to be seriously affected. The American Cancer Society adds that your ability to get an erection before the operation also shapes how much comes back.
What is penile rehabilitation, and does it work?
Penile rehabilitation means using pills, injections or other aids after surgery to bring blood into the erectile tissue regularly, with the hope of protecting it while the nerves heal. Some surgeons encourage trying for erections as soon as the body has healed enough, as the American Cancer Society describes.
The evidence is honest about its limits. The AUA guideline states that early use of PDE5 pills after treatment may not improve natural, unassisted erections, and that rehabilitation protocols tested to date remain unproven. In other words, assisted erections let you have sex and stay connected during recovery, which has real value, but no protocol has been shown to make the nerves heal faster.
Pills or injections in the meantime?
The choice depends on your nerves:
- PDE5 pills such as sildenafil and tadalafil need working nerves to amplify. The American Cancer Society notes they will not work if both nerves that control erections were damaged or removed. After a nerve-sparing operation, they may help more as recovery progresses.
- Injections act directly on the blood vessels in the erectile tissue, so they work without nerve signals. The American Cancer Society describes alprostadil injections given 5 to 10 minutes before sex, and compounded Trimix injections work on the same principle with three medicines.
Any injection carries a risk of priapism. An erection lasting four hours is an emergency: call 911 or go to an emergency room. Our page on an erection lasting more than 4 hours explains why.
Related question: is recovery different after radiation?
Yes, the process differs from surgery, and so does the timeline men should expect. Our page on ED after prostate radiation covers that path.
How Ultimate Male supports recovery after surgery
ED care after prostatectomy works alongside your cancer care, never instead of it. At our San Gabriel and Downey clinics, a PA-C or MD reviews your operative details, including whether one or both nerve bundles were spared, your pre-surgery function and your current medicines, then builds a plan that fits where you are in the 24-month window.
That might mean starting with a pill, moving to injections if pills do nothing, and reassessing as natural function returns, with your urologist and oncologist informed. The condition page on ED after prostatectomy goes deeper, and the page for men after prostate cancer treatment covers broader health questions. See erectile dysfunction treatment or start with a free 10-minute call.
