Scratchy skin is not a lack of a substance in the body, there is no direct relationship between the two. Scratchy skin, commonly known as artificial urticaria, is a special type of urticaria, mostly seen in young people with allergies, manifested as skin scratched by some blunt objects or nails, appearing skin scratching signs, localized elevation after pressure, similar to the shape of a whip whip, known as positive skin scratching signs, in severe cases can appear wind mass, accompanied by itching and other symptoms, belong to allergic diseases. Therefore, scratchy skin is an allergic disease with mainly type I allergic reactions, which is related to the patient’s own immune status, emotion and allergy to certain external substances, and is not necessarily related to the lack of substances. If the patient’s nutritional status and body immune status are poor, he or she may be more prone to artificial urticaria, rather than a deficiency of a certain nutrient causing the disease to occur. In addition, when patients have artificial urticaria, it is recommended to follow medical advice to use medication, such as taking chlorpheniramine maleate tablets, loratadine and other anti-allergy drugs, it is necessary to pay attention to not to stop the medication because the symptoms are relieved, so as to avoid the short duration of the medication is easy to make artificial urticaria recur. In addition, pay attention to proper supplementation of vitamin C and a light diet, and do not scratch the area.