Help. Ideas on the cause??

[Gmama]

43 y/o f
What started about a year ago as thinning hair has now turned into this. I am planning on seeing a dr soon.
FYI. No hereditary baldness, no meds, no chemo
Sometimes it seems hair may be sprouting back in. Ither times its worse. The area has spread , probably tripled over the past few months from last year.
Anyone???