Hi Ellen Wilson,
I don't see anything that indicates that constipation is a symptom of any prostate related issue. You can read about constipation and it's causes here. There is something called benign prostatic hyperplasia that causes constipation. You can read about that here.
I hope this helps some. Online resources are great for getting information but can not take the place of your doctor's care and advice.
Take care and stay in touch. Let us know how you are doing!
Vicki M
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