Bizarre allergies are more of a modern phenomenon. We explore some strange ones that doctors have reported like memory foam, guitar strings and more.

You may experience an increase in mucus production after an aerobic workout due to environmental triggers, illness or pollution.

Sinus pressure can be a pain, but in most cases it won't prevent you from doing cardio. You may need to adjust the intensity based on your symptoms.

Certain plants of the genus Gossypium have soft fibers that cling to the seeds. When harvested and processed, they make a fine textile called cotton. This fabric has clothed millions of people and has furnished blankets and pillowcases for the comfort of sleepers.

Peppermint oil is a highly revered herbal remedy used for the treatment of respiratory problems, indigestion, headaches, nausea, irritable bowel syndrome, and urinary tract infections. It also contains a significant amount of nutrients including vitamin A and C, iron, magnesium, potassium, and calcium.

Compounds within stone fruit may cause allergic reactions in some people shortly after they eat cherries, peaches or plums. Usually the resulting allergy symptoms are confined to the digestive tract, but some cases include systemic symptoms, which can affect other organs and tissues of the body.

There are many types of allergens that can cause a physical reaction in your body; however, food allergies can be some of the most dangerous because the allergen is consumed. An estimated 6 to 8 percent of children under age 3 and about 4 percent of adults have some kind of food allergy, states the Mayo Clinic.

While moderate alcohol consumption can have a beneficial effect on your health, reducing the risk of cardiovascular disease, opting for wine might cause side effects. The sulfites and histamines in wine might cause adverse effects, and they are the chemicals typically responsible for allergic reactions.

Seasonal allergies affect more than 35 million Americans, states the American Academy of Allergy Asthma and Immunology. Symptoms consist of sneezing, stuffiness, runny nose, nasal itching, throat itching and eye or ear irritation.

A food allergy is caused by the body producing immunoglobin E or IgE antibiodies to a certain food. It is an immune system reaction that occurs after consumption of a particular food.

Keeping birds as pets may seem like a harmless hobby, but allergies to bird feather dander and bird fecal matter present health risks in the form of allergies. While more people develop allergies to cats and dogs, allergic reaction to birds is commonplace.

One percent of the U.S. population reports an allergy to peanuts or tree nuts, including cashews, according to a study published in the 2012 issue of “The Journal of Allergy and Clinical Immunology.” Symptoms of cashew allergy involve the skin, gastrointestinal and respiratory systems.