Rub the back of a knife or other straight-edged item with a stinger to remove it. Using tweezers can cause the poisonous sack to be crushed and discharge even more poison into the wound; therefore, avoid doing so. Next, wash the area completely with water and soap. After applying ice to the area of the sting for ten minutes, remove it for another ten minutes. An allergy medicine can be used if necessary to reduce the itching. Over the next several days the stinger site should be watched for signs of infection, such as increase,