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Yes, it may be, but there is a pretty fair chance of superimposed telogen effluvium. If you are on both medications, then it has got to control except in few cases where these will not work. Since you said that you are already on Minoxidil for the last 6 years, I do not find any reason for its progression as you have responded well. Now, regarding telogen effluvium, it is a pretty common disorder and is considered the closest differential diagnosis of androgenic alopecia. The only difference is that there will a typical pattern of hair fall in androgenic alopecia while in telogen effluvium whole scalp is involved. This is the reason I have asked you about the recent history of trauma, surgery, stress, etc. Serum iron deficiency is also an important cause behind it, so you need to test your serum ferritin level. In most cases, it is self limiting and in a few cases, it gets converted into chronic telogen effluvium.