Is high dhea-s a symptom of the problem or does the high dheas cause hair loss?

I had really high dhea-s (477) which I believed was causing my hair loss. Doctor put me on dexamethasone 0.25 daily. It stopped my hair loss and lowered my dheas. I just tapered off about a week ago and my dheas are still low but hair loss is starting again. So my question is... Is high dhea-s a symptom of the problem like an inflammatory response or does the high dheas cause hair loss? If my dheas is now normal why did stopping the dexamethasone cause hair loss to return?