Please give pills, hair will grow back. there is specific thing in Psoriasis called koebner phenomenon, The Koebner phenomenon, also called the Koebner response or the isomorphic response , refers to skin lesions appearing on lines of trauma.[1] The Koebner phenomenon may result from either a linear exposure or irritation. Conditions demonstrating linear lesions after a linear exposure to a causative agent include: molluscum contagiosum, warts and toxicodendron dermatitis (a dermatitis caused by a genus of plants including poison ivy). Warts and molluscum contagiosum lesions can be spread in linear patterns by self-scratching ( auto-inoculation ). Toxicodendron dermatitis lesions are often linear from brushing up against the plant. Causes of the Koebner phenomenon that are secondary to scratching rather than an infective or chemical cause include vitiligo, psoriasis, lichen planus, lichen nitidus, pityriasis rubra pilaris, and keratosis follicularis http://en.wikipedia.org/wiki/Koebner_phenomenon so Psoriasis my come out from this alopecia lesions