The bite of poisonous insects can show redness, swelling, pain and exudation. It is necessary to apply clean hands to squeeze the affected area so that the poisonous juice of poisonous insects can be fully excreted to reduce the local inflammatory reaction. Levocetirizine hydrochloride oral solution or imipramine extended-release tablets can also be applied in order to play a therapeutic effect of anti-inflammation, anti-allergy, constriction of capillaries and reduction of inflammatory reaction. Topical treatment with fusidic acid ointment or ofloxacin gel can be applied in order to further promote the disappearance of inflammation.