What are symptoms of allergies?

Allergy symptoms: Sneezing; itchy, watery eyes; dark circles under eyes ("allergic shiners"); crease at base of nose (from "allergic salute"-wiping nose upwards with back of hand; post-nasal drainage; lack of energy. Many treatments available to relieve symptoms: antihistamines (claritin/zyrtec), nasal steroid sprays, mast cell stabilizer spray (cells that release histamine), desensitization tx to allergens.

Multiple symptoms: Type i hsr (typical allergies as people think of them) lead to symptoms that can affect many parts of the body including the skin (flushing, hives, itching, swelling), throat closure, change in quality of voice, breathing difficulties (coughing, wheezing, tightness, shortness of breath), GI problems (vomiting, diarrhea), and can cause cardiovascular effects such as rapid heart rate, shock, death.