Have you ever been tested for lyme? My husband had something similar it would come and go. He ended up having lyme. After antiboitics it stopped but now and then he has flare ups.

Use the Tinactin cream Tolnaftae 1% for athelete's feet, antifungal.

I've had something quite similar before. It went away when I took Diflucan, so I suspect it was Candida skin infection. Also if you apply 100% aloe vera gel, it alleviates the symptoms.