It seems that you may be having scap psoriasis.
It is autuimmune skin disease of unknown cause.
There may be mild to severe itching
There may be tenderness.
There may oozing of blood after removing flakes.
Stress, dry weather,sunrays,alcohol,tabacco,worries,sleeplessness
,drugs..etc may precipitate.
Local application of combined steroid and salicylic acid
lotion might reduce the flakes.
Oral methotraxate and antihistaminics woud be helpful.
Oral steroids should be avoided.
You consult dermatologist
for perfect diagnosis and treatment.
I hope you got my answer.
Dr.Ilyas Patel MD