What kind of skin condition is not itchy but turns white and scaly when scratched?

Dermatographism. A form of urticaria in which whealing occurs in the site and in the configuration of application of stroking (pressure, friction) of the skin. The resulting white line response appears early in flares of atopic dermatitis. Synonym(s): autographism, factitious urticaria, skin writing, white dermatographism and physical urticaria.