 [ Symptoms ] what causes blocked arteries my mom has had stints put in but they still keep getting blocked i understand that smoking plays a role but smoking can not be all of it the doctors here believe that is all that is causing the heart attack and blocked arteries and dont bother to check for anything else [ Disease ] if spider bite…not to worry spider bites are superficial and affect the top layers of the skin 99 9 of spider toxins do not enter your bloodstream unless they are rare and dangerous spiders if they do baby has own bloodstream put ice on it and see what happens if condition persists see a dermatologist