It may be urticaria, papular urticaria, eczema-like dermatitis and so on. Because the patient is in a state of allergy, after scratching through the fingers, due to physical stimulation, stimulate the inflammatory factor under the epidermis, once this inflammatory factor is released, it will form pimples, pimples, and some of them will appear as an eruption-like damage. For example, in some cases of chronic urticaria, if you scratch, the scratches will protrude from the skin surface and feel like a red bar. Therefore, active anti-allergy treatment is needed at this time. General anti-allergy treatment, you can take oral ebastine, loratadine, are 1 day / 1 pill, and at the same time can be added to the use of proprietary Chinese medicines, such as soothing the skin to relieve itching granules.