Found this article which articulates what I've known for a decade, that alopecia can lead into other, worse autoimmune diseases. Here's the key quote:

Alopecia areata is sometimes associated with other autoimmune conditions such as allergic disorders, thyroid disease, vitiligo, lupus, rheumatoid arthritis, and ulcerative colitis.

And here's the link to the entire article:
alopecia overview


I am hoping to hear from people who have had experiences along these lines, multiple autoimmune disease.

Or leave links to more in-depth articles, sites, books, etc.