Digital Drawing Help Needed - Tumblr Posts

digital drawing help

Hi, i am working on my novel projects, and i am having trouble on an element in one of my drawings i am making for it. 

When i am trying to draw a large amount of fire, or any amount of fire to be exact, it never looks like fire, it always turns out looking like fur. 

The thing is, the issues aren't with the colors, its with the shape and the outlines of the fire that i am having trouble with. 

Does anyone have any tips on drawing/shaping fire? 

Again, the problems aren't with the colors.