What should be done immediately after a known arthropod bite?

Immediately cleaning the area of an arthropod bite is crucial because it helps minimize the risk of infection. By removing any dirt or potential pathogens, the cleaning process can prevent the bite site from becoming a breeding ground for bacteria. Using soap and clean water to wash the area effectively reduces inflammation and prepares the site for any further treatment that may be necessary, such as applying antiseptic or seeking medical advice.

While applying antiseptic and seeking medical attention are important steps, they are generally considered after proper cleaning of the wound. Marking the bite location can be useful in tracking changes, but it does not address the immediate need to clean the site to reduce infection risks. Therefore, the most critical first step following a known arthropod bite is to ensure the area is clean.