A little itchy after the skin test suggests that the surrounding local application of povidone-iodine or erythromycin ointment to stop itching, or go to the hospital for desensitization treatment, prohibit scratching.
A little itchy skin test may be an adverse reaction to the skin test, or it may be caused by drug allergies. Either way, you should not scratch the skin test site after the skin test, as your hands may be contaminated with a variety of bacteria, and scratching the skin test site may lead to bacterial infection.
If the itch is caused by an adverse reaction, it is usually localized itching at the skin test site, which usually subsides within a few days, during which time povidone-iodine can be applied to stop the itch.
If the itch is caused by drug allergy, the drug should be banned subsequently, and the allergy can subside on its own if the allergy is mild, while serious cases are recommended to go to the hospital for desensitization treatment.
In addition, a light diet is recommended during the skin test to reduce the incidence of adverse reactions.