Sensations of hotness result from O simultaneous stimulation of warm and cold receptors.
stimulation of hot receptors.
o stimulation of cold receptors.
o stimulation of pain receptors.
o stimulation of warm receptors.

Depression is lifelong, though you can get medication to with it. the difference between sadness and depression is that sadness lasts a little bit, depression last a long time and it goes on and off. people usually get depression through experiences they have been through, or genetics.