Mehraveh Sayyah on Instagram: "The role of physical friction as an irritant in the causation of contact dermatitis is under-recognized. Frictional dermatitis is defined as an eczematous process in which physical frictional trauma contributes to the induction of a dermatitis process. Bed friction refers to the rubbing or friction that occurs between the body and the bed sheets while sleeping or lying in bed. It is the result of movement or contact between the skin and the fabric of the sheets. Be