 [ Symptoms ] i was treated for chlamydia but had protected sex one day after treatment should i retest [ Disease ] yes  peanuts are not really nuts they are legumes they grow in the soil treenuts like walnuts pecans or cashews grow in trees    hence the name peanuts and treenuts are completely different types of allergies but there are some food allergies that do go hand in hand for instance a person who is allergic to cashews might also be allergic to mangos and pistachios