I can handle pain.
I can take more pain than anyone.
I have a high tolerance for pain.
I have a high tolerance for pain - both physical and mental.
If you feel pain, you have to make up your mind whether you can play with it or not.
All pain is either severe or slight, if slight, it is easily endured; if severe, it will without doubt be brief.
I think I have got a decent pain threshold.
I don't feel pain like most people.
I sometimes stop and wonder if I have a superhumanly high pain threshold and I just don't know it... But then I stub my toe and think probably not.