Hi doctors, I am experiencing a lot of white coloured slightly thick flakes coming out of my scalp when I scratch it (Refer images). At a few places, they are greasy and would stick in my nails. I also have scaling scalp where I could see residual of white coloured flakes on my hairline which doesn't go away even after shampooing (I use anti dandruff shampoo).Although there is no redness or itchiness. I am not sure if this is my dry scalp or dandruff situation but I've referred dermatologists which didn't help either. I've used a bunch of shampoos and cream but no positive result. Please help me understand what it can possibly be and let me know trusted solutions. I have also heard Neutrogena t sal and t gel are really good options. Which one should I go with considering my condition? Thank you in advance.