Shingles or spider bite, how can i tell?

Spider bites can: Have variable appearances. It might cause a pink or red bump with no symptoms. Or it could itch or be painful. Venomous spiders may cause significant pain radiating far from the site, cramping, sweating, necrosis of tissue or worse if there is an allergic reaction.** shingles has multiple blistering lesions in a particular location on only 1 side of the body ; can cause severe burning pain.