Talk to Dermatologist on Hair / Scalp

I have a severe habit of peeling my scalp. I get this big flakes from my scalp as seen in the picture and end up with these red zakhm type on my scalp. I was recently diagnosed for Seborrheic dermatitis. And was given a medicated shampoo but initially it worked but not anymore. And i want to get rid of this peeling habit as this has resulted in extreme hairloss. Kindly help me what to do? Is it really Seborrheic dermatitis or something else? Need solution please. Thank you.