There are six major types of allergic reactions. Usually, an allergy does not cause the individual to feel sick all over and does not cause a fever.
More severe cases can cause nasal obstruction, facial pressure and facial pain.
This type of allergy commonly causes nose and sinus symptoms along with asthma. The symptoms include itching, hives, wheezing and rarely death. Shown in the picture to the right is a nose with chronic allergic rhinitis . The second type of allergy is a Type III reaction it is mediated by IgG and occurs many days after exposure to the foreign substance. The third type of allergy is a Type IV delayed hypersensitivity reaction.