I am wondering if there has been a study that directly points to chronic seborrheic dermatitis as a cause of Peripheral Neuropathy?

The doctors sometimes (or oftentimes), disregard to go out of their way to pursue some avenues that may lead to the proper diagnosis of the patient.

I have a chronic seborrheic dermatitis that has been on for years, inspite of all kinds of "dandruff shampoo", hydrocortisone solution, herbal supplements, anti-dandruff creams, etc. and no success.

So far, the neurologists have not found the cause of my neuropathy. And it seems, they all sort of indirectly telling me that my case is idiopathic.
Somebody in this forum wrote that if there is only a magic pill that these doctors can try even for a day to experience how physically painful and emotionally dreadful this disease is, these so called specialists will be more empathetic and will evaluate us more carefully.... and not just say "idiopathic" as a matter of course. I believe we will learn to accept that our PN is idiopathic if we think that everything has already been exhausted.

Anyway, I got side tracked (sorry for that).... so, I am just thinking if my seborrheic dermatitis may have something to do with my SFN. If yes, what possible tests should I suggest to my doctor to confirm this, if any?

Will appreciate any thoughts about it.

Thank you.