What would cause front brakes to slowly siez around 4-5 day. Unless openclose bleeder

What is your question?

Driving for twenty minutes or so I have to pull over and open the bleeder valve to release the pressure in my brakes . I have to do that alot or the brakes will heat up and stop the van.

What makes this problem better or worse?

When I release the pressure from the bleader valve it seems to make better for a few