At first right leg and foot was burning now only my right foot is that because of my sergery on my spine. i also can not feel hot or cold ?

Can be related: Because all of the nerves that supply the lower leg come from your spine, if you have an issue or surgery to the spinal area you can have pain down in the lower part of your leg or foot. If the burning pain is moving down into only your foot, it is a good sign that the symptoms are starting to go away. You should talk to your surgeon about this, to make sure they are aware of this.