• Roughly 7.8% of people 18 and over in the USA have hay fever.
• In 2010, white children in the USA were more likely to have had allergic rhinitis (10%) than black children (7%).
• Worldwide, allergic rhinitis affects between 10% and 30 % of the total world population
• Worldwide,  allergen sensitization (IgE antibodies) to foreign proteins in the environment is present in up to 40% of the population.
• In 2012, 7.5% or 17.6 million adults were diagnosed with allergic rhintis in the past 12 months.

Allergens may enter the body in four different ways:  

• airways through respiratory system breathing an allergen
•  skin by touching an allergen
•  gastrointestinal tract by ingesting an allergen
•  circulatory system -allergen entering the bloodstream.

 Common symptoms include:   

• Sneezing and itchy, stuffy or runny watery nose(allergic rhinitis)
• Itching around the nose, mouth, eyes, or roof of the mouth 
•  swelling around the face, swollen lips, tongue (angioedema) 
• Itchy skin.
• Skin rashes (allergic contact dermatitis, eczema) 
• Hives/Urticaria
• dry Cough
• Wheezing
• Anaphylaxis (a severe allergic reaction) 

• If you've allergy symptoms, the most important thing you can do is avoid your known triggers as much as possible. Consult for treatment options with a doctor.
• For some patients, over-the-counter medicine may be sufficient in relieveing allergies. For other patients, prescription medications and other treatments may be necessary. Consult with your doctor or a healthcare professional to develop a treatment plan.  

• Keep a symptom diary handy – detail it when and where you experience symptoms, any new products you have used, foods are eaten, etc.
• Try an over-the-counter allergy medicine if not able to consult doctor (check with your doctor, particularly if you are taking other medications).
• For severe symptoms – make an immediate appointment with a certified allergy specialist doctor for testing, diagnosis, and to develop a treatment plan.

• A fever isn't a symptom of an allergy. A fever is normally a sign of an infection, either from a bacteria or virus. If you have allergy symptoms and also fever, make an appointment with a healthcare provider to discuss your symptoms and discuss treatments.

• Individuals sneeze in response to an irritation or tickle in their nose. When the inner side of your nose gets a tickle, the nerve endings send a message to the sneeze center in your brain. This transmits a message to a very complex set of muscles to get rid of the tickle quickly. 
• Some individuals sneeze when they breathe cold ai.Others sneeze whenever stepping from dark into bright light. If this is happening to you, then you might have a condition called “photic” (meaning “light”) sneezing.