I broke my big toe 2 months ago but the top of my foot painful, very swollen. now the cast is off top of foot feel and look the same hurt to walk. why?

One would need to: See the x-rays in order to evaluate and make a proper assessment.

Depends on break: It depends on the type of big toe break and how you did it. Did the bone break go into the joint? How you broke it may have caused some other type of bone or joint injury at the midfoot. It is also still healing and you are getting used to walking again, and this can take time. I am sure your doctor has checked x-rays. If this does not decrease some within 1-2 weeks, you may need an mri.

Pain: We cannot see your x rays to know the extent of the fracture nor do we know what occurred to cause the break . It is possible that more damage was done than was thought . You may need further imaging studies, too . See your treating physician for this and any questions and concerns.