Hair loss

I have just had a three day steroid treatment last week I went to my hairdressess this morning and she asked me if i had noticed any hair loss since last time as she noticed it was alot thiner than normal and she did not need to take much of the thickness
I was wondering if any one else has this experiance wether it was MS related , or the drugs i take or wether it is related to the steroids

My haur started to thin after taking gabapentin.[It is one of its less common side effects].