this happens to me maybe 2-3 times a month and it hurts so bad and i would like to no why this is happening.

i notice when i wake up sometimes the bottom of my foot is bruised really bad, and in different spots every time, in the morning and at night it hurts the most so i have to limp around my house and during the day it doesnt even get that much better,i thought i was just kicking the wall in my sleep but yesterday i started feeling the pain mid day and by the night i couldnt walk, in that day i noticed i did not take my shoes off all day, could not taking your shoes off do some thing like that?

why do i keep getting this