Jada does not have a serious illness.
My friend had alopecia in high school- stress related.
I had a friend with alopecia, too. But the friend was male. He joked about not having to shave his head anymore (which he did even before the onset — liked the bald look and pulled it off well).
Alopecia doesn’t carry the same cultural stigma for men as it does women IMHO. But yeah, it’s not life threatening.
PS It’s actually believed to be an autoimmune disorder that definitely can be exacerbated by stress.