One week after the pupil line is done, itching may be a normal phenomenon, but also may be caused by infection and allergy, when there is infection and allergy, anti-infection drugs should be used for treatment. 1. Normal phenomenon: after the pupil line, due to local damage, in a week, the wound part gradually healing, in the healing, there will be a mild itching, is a normal phenomenon, usually can be improved on their own, do not need to carry out special treatment, should keep the local clean, to avoid excessive squeezing and scratching. 2. Infection: During the recovery period, improper care of the wound site may lead to local infection, due to inflammatory substances stimulation, itching will occur, accompanied by oozing, pain and other symptoms, after diagnosis, antibiotics can be applied to treat, such as ciprofloxacin, levofloxacin and so on. 3. Allergy: For itching caused by allergy, after diagnosis, anti-allergy drugs should be used, such as cetirizine and loratadine. In the treatment period, must follow the doctor’s instructions reasonable use of drugs, do not arbitrarily use drugs for treatment, to avoid causing adverse reactions.