is it ED?

My bf of almost 2 yrs and I have had a great sex life... Up until bout 2 weeks ago. He's had the normal and very rare issue of staying hard during sex. In the last 2 weeks almost everytime we've had sex he can get hard but has difficulty stay hard. He also informed me that he can't even masterbate. But he's only 24 could he have ED?

[AnnieBrooke]

I am not sure, but think ED usually refers to the inability to get an erection in the first place.  If he has erections that don't stay, he could talk to his doctor and see if one of the ED drugs would help.

[Momo1409]

I really hope its just stress or something. How fast it started happening makes me worry it me. I've put on like 10lbs. But he says he can't get an erection from masterbation (masturbation) at all.