Telogen Effluvium has a specific cause. Its typically not a mystery. Telogen Effluvium in its truest form is not something that just happens out of the blue with no apparent source. Telogen Effluvium is typically a result of crash dieting, a severely (SEVERELY) emotional breakdown that involves stress, extreme malnutrition, or more frequently medications. Antidepressants and the like.
The best thing you can do at this point to prove or disprove that your derm is right, is to ask him or her point blank, since he/she feels you have Telogen Effluvium, what exactly triggered it.
Doctors have a god complex, and I am quite sure the doctor will say this in response: "I don't know what caused it but your hormone panel looks normal". At which point you can say "Telogen Effluvium by its very nature has a cause. It's not something that just happens out of the blue with no known reason. If it does happen in that matter, it is almost always not Telogen Effluvium. It has a different cause. Besides, even someone with Androgenetic Alopecia can go through shedding and be told they have Telogen Effluvium, and it has been established that women with Androgenetic Alopecia can have normal blood panel results". Your doctor will probably be lost at that point and have nothing to offer. Expect it.
Either way anita, as Ive mentioned before, the treatment is the same. Start using Rogaine and give it at least 6 months.
Laura