Hello. Thanks for writing to us at healthcaremagic The features that you mention (xerosis, hyperlinear palms and keratosis pilaris) are commonly those of atopic individuals. Atopic skin has a reduced water retentive capacity and is therefore dry and itchy, specially in dry and cold weather conditions in winters. In addition to that you have been asked to use, If I was the treating doctor I would have also added an intensive moisturizer cream/lotion, to be used twice daily, because the underlying issue is basically severe dryness of the skin in atopics. Your treatment comprises an oral antihistamine for itch control and primrose oil capsules; evening primrose oil is supposed to have anti-inflammatory properties supposed to benefit in atopic eczema. Salicylic acid ointment is for keratosis pilaris which are horny plugs of keratin around the hair follicles; most commonly seen on the outer arms, thighs, elbows and knee joints. Salicylic acid being a keratolytic would dissolve the horny keratin plugs Regards