Lichenisation occurs in which layer of skin­-
The Malpighian layer of the skin is generally defined as both the stratum basale and stratum spinosum as a unit, although it is occasionally defined as the stratum basale specifically,or the stratum spinosum specifically.
It is named after Marcello Malpighi
Stratum malpighi
Stratum corneum
Stratum hucidum
Stratum granulosum