The itchy injection eye may be caused by the infection of the injection site, or it may be caused by allergy. 1. Local infection: If the injection site is not cleaned hygienically enough during the injection process, it can lead to local bacterial infection. It is recommended to carry out local disinfection before and after the injection to prevent bacterial growth. 2. Local allergy: because the body is allergic to the agent, after the skin contact with some kind of external material, an inflammatory reaction occurs in the contact area, accompanied by the phenomenon of redness and swelling of the eye of the needle. It is recommended that patients with pinhole itching, according to the cause of itching and choose the treatment method. If the itch is caused by infection, antibiotics such as amoxicillin can be used as prescribed by the doctor. If the itch is caused by allergy, then under the guidance of the doctor should take loratadine tablets and other anti-allergy drugs. It is recommended that the patient under the guidance of a professional physician reasonable use of scientific treatment.