The diagnosis comes before the treatment
Thinning hair has many causes and they do not respond to the same thing. Sudden diffuse shedding a few months after an illness, a surgery, childbirth or major stress often resolves on its own. Thinning driven by thyroid disease or low iron improves when the underlying issue is treated. Pattern hair loss is progressive and needs ongoing management. Treating all of these identically is why so many people spend a year on something that was never going to work.




