Hello bigbadbazzajunior, 

I hope that your radiotherapy treatment for prostate cancer is going ok and that you are not experiencing any significant side effects. I am not sure what would cause these black spots in your poo but it's worth flagging it with your medical team so make sure you bring it up so that they are aware you are experiencing this. 

I hope that you will hear from other members of our community who also have prostate cancer and are going through radiotherapy treatment and may have noticed similar black spots. Whatever this is, I think it is important to find out the cause and I hope that this will improve quickly. 

Do give your GP or specialist a call as soon as you can and mention this has been happening to you and I hope you get some answers on this very soon. 

Best wishes, 

Lucie, Cancer Chat Moderator

Hello bigbadbazzajunior, 

I hope that your radiotherapy treatment for prostate cancer is going ok and that you are not experiencing any significant side effects. I am not sure what would cause these black spots in your poo but it's worth flagging it with your medical team so make sure you bring it up so that they are aware you are experiencing this. 

I hope that you will hear from other members of our community who also have prostate cancer and are going through radiotherapy treatment and may have noticed similar black spots. Whatever this is, I think it is important to find out the cause and I hope that this will improve quickly. 

Do give your GP or specialist a call as soon as you can and mention this has been happening to you and I hope you get some answers on this very soon. 

Best wishes, 

Lucie, Cancer Chat Moderator