Psoriasis and hairloss related query.

Hello doctor. Its been 10 days since I have been applying tarich shampoo and topisal 3% solution 3times a week as prescribed by my dermatologist for psoriasis...today just before applying tarich,I wet my hair and ran my fingers across my hair and found 7-8 hair present on my hand...I started running my fingers around again and again(15 times approx) and found that initially l got 7-8 hair on my hand but then it reduced to 5-6 and then 3-4 and then so on.(for the 15 times I ran my fingers across my hair)...so i would like to know if this treatment is causing hair loss? Note:I didn't take a head bath yesterday and also didn't run my fingers across my hair yesterday...So today was the 1st time in 2 days I ran my fingers across my hair. Have sent some snaps of my hair.Hopefully they are helpful. Thank you