It is estimated that about 40 to 50 million Americans suffer from allergies, according to the University of Maryland Medical Center. People with seasonal allergies commonly are allergic to pollen, certain types of grasses or weeds. An allergic reaction occurs when the immune system doesn't recognize a particular substance, such as pollen. The body releases antibodies and histamine to ward off the foreign substance, according to the Mayo Clinic. The release of these chemicals in the body causes the common seasonal allergy symptoms, such as sinus inflammation, eye irritation and eczema.
Sinus Inflammation
Most people who suffer from seasonal allergies experience sinus inflammation. The most common nasal symptoms are nasal congestion, nasal discharge and bouts of sneezing. Nasal congestion may result from excess mucus or the swelling of the sinus cavity. The excess mucus attempts to drain out of the nose (a runny nose) or it can drip in the back of the throat (postnasal drip). Postnasal drip can cause throat irritation, cough and chest congestion. Seasonal allergies can cause the nose to itch, resulting in sneezing.
The Mayo Clinic says the most effective over-the-counter drugs used to treat sinus inflammation due to seasonal allergies are an antihistamine and decongestant. Sinus inflammation from seasonal allergies can lead to a sinus infection. A person should see a doctor if she suspects an infection has developed.
Eye Irritation
The eyes can become red, itchy and swollen, especially at the first signs of pollen, according to PDRhealth.com. Many people with seasonal allergies rub their eyes due to a constant itch or burning sensation. One or both eyes may weep (draining of tears) due to the irritation. The area surrounding the eyes may become swollen (conjunctivitis) and discolored, appearing black and blue. Over-the-counter eye drops can soothe the eye irritation and reduce redness.
Eczema
Eczema is an allergic reaction on the skin manifesting as small, red bumps that eventually grow and increase in itchiness. Eczema causes the skin to swell in the affected areas, and may ooze and crust over. In severe cases eczema can leave permanent scaring if not treated. People with eczema will commonly suffer a flareup. Eczema from seasonal allergies can be prevented and treated with an over-the-counter oral antihistamine and a prescription corticosteroid topical cream, according to the National Institute of Arthritis and Musculoskeletal and Skin Disorders (NIAMS).
