What is advised not to do when treating a snake or spider bite?

Applying a tourniquet is advised against when treating a snake or spider bite because it can do more harm than good. Tourniquets are designed to constrict blood flow to a limb in cases of severe bleeding, but in the context of venomous bites, this method can exacerbate tissue damage, increase pain, and lead to complications such as limb loss. Instead, the recommended approach is to keep the affected area immobilized and at or below the level of the heart to reduce the spread of venom. This helps to minimize the body’s exposure to the toxin while allowing for medical help to be sought promptly.

Other methods such as washing the wound or monitoring breathing are generally encouraged, as cleaning the bite area can help prevent infection, and monitoring vital signs is crucial for assessing the patient's overall condition.