To dream of your own back signifies your attributes, beliefs, opinions, and position in life. This could also indicate tension that is being placed upon you by someone else.
If you dream of a bare back, this represents an undisclosed truth that you are hiding from others. This is related to the phrase, 'watch your back' and your dream could be indicating this very notion. Historically, dreaming of a back is an indicator that you should not loan money to anybody, especially not friends, as this could create undue pressure in your friendship.
To dream that someone turns their back to you indicates pain caused by coveting or envy.