Suggest Treatment For Swollen Red Feet

hi, i have an issue which id like to address. but i dont no what the problem is. Ive been to the doctors and the specialists but they dont seem to figure out the problem. It has become a bigger issue and i would like to do something about it before its too late. would you be able to help me out? Ive been going through this for a while now and sadly havent tooken it seriously, when i stand up for a certain period of time, when im exposed to too much heat or even randomly, my feet and leg become swollen and turn into a red colour, but these are like patches of red circles, if i dont do anything about it and try to ignore it, when i look back at it i realise that the tips of my toes turn a purplish colour, its itchy and it hurts. i dont no what to do. would you be able to tell me whats wrong?