HI...thanks for writing here.Scabs on scalp may be either seborrohic dermatitis or it may be scalp psoriasis
.In both cases recurrence is common and maintenance treatment is required..Since t gel shampoo contains salicylic acid
and coal tar it will be helpful for you.Alternate wash with ketoconazole
shampoo and t gel will produce better results ,so use it in that manner.If still your scabs are not in control then better consult a dermatologist
for further treatment.