Go through these in order and stop at the first one that applies. If you are reading this for someone else, answer for them.
1
Is any of this happening now?
Call 911
Seek emergency care for chest pain, fainting, severe breathing difficulty, or swelling of the face or throat after using a treatment.
Other emergency signs, for anyone
Someone who is struggling to breathe, gasping, choking, or cannot get words out
Someone who has chest pain, tightness or pressure lasting more than a few minutes
Someone who has sudden weakness or drooping on one side of the face or body, slurred speech, or sudden confusion
Someone who is unconscious, or cannot be woken
Someone who is bleeding heavily and it will not stop with firm pressure
Someone who has had a seizure that will not stop, or does not wake up afterwards
Someone who has lips or skin that look pale, blue, grey or blotchy
Someone who you believe has taken an overdose or swallowed something poisonous
2
Is any of this happening?
Be seen today
Seek prompt medical assessment if hair loss is:
Sudden or rapidly worsening
In smooth, clearly defined patches
Accompanied by scalp pain, burning, pus, heavy scaling, or marked redness
Associated with shiny, scar-like skin or loss of follicle openings
Accompanied by unexplained fatigue, weight change, menstrual changes, facial hair growth, or severe acne
These symptoms may indicate a serious medicine reaction or another urgent condition.
3
Does any of this apply?
Book an appointment
Arrange a routine appointment if gradual hair thinning concerns you or you want to discuss its cause or treatment.
Assessment is also helpful before spending money on supplements or commercial procedures.
The article also says
Female pattern baldness itself is not an emergency.
Every sign above is quoted from the sofidex article on Female pattern baldness. If you are not sure, err upward — it is always reasonable to be checked.