Can low dose Naltrexone cause hair loss in women?

You need a diagnosis. There is no substitute and no real other option but to get a confirmation of diagnosis before moving on with treatment. Blindly treating without a diagnosis and using drugs that may or may not be helpful is never advisable. First and foremost a diagnosis is needed. Hair loss from frontal fibrosing alopecia is treated differently than alopecia areata and treated differently from trichotillomania, alopecia mucinosa, and infiltrative diseases.