i had undergone color doppler test,in which my lower left limb blood flow is very slow,maybe due to smoking,now i have developed blood clot on my left thigh,and dry gangrene,i am applying cetraben cream.the wounds are not healing and i get burning sensation,i cannot sleep,so i have to take sleeping pills,please help me as i am poor and i cannot undergo operation,your opinion will be very helpfull.