Allergic reactions to shellfish or peanuts can be serious or even life-threatening. If you are allergic to one or both of these foods, you should check for their presence in any medications you take. Shellfish is commonly found only in dietary supplements, not prescription medications.

Watery eyes are a minor symptom of gluten intolerance, also called gluten allergy. A gluten allergy is a different condition than celiac disease, which causes the immune system to damage your small intestines when you eat products that contain gluten.

Some people develop sensitivities to one or multiple substances in wheat, and experience some degree of health problems whenever they ingest them. Allergic reactions to proteins and other compounds in wheat flour create mild to life-threatening allergy symptoms.

Fatigue can be a sign of food allergy, including milk protein allergy. It may be related to other chronic symptoms of the allergy, such as coughing, running or stuffy nose and digestive problems, that interfere with your sleep. Consult your doctor for help in identifying the cause of your tiredness.

If you are allergic to strawberries, your immune system triggers the production of IgE (immunoglobulin E), an antibody and histamine each time that you eat strawberries.

Fiberglass allergies can occur when someone handles fiberglass insulation. A fiberglass allergy causes a condition known as contact dermatitis on the skin, and it can also cause breathing problems when the small particles of fiberglass are inhaled. The symptoms can range from mild to severe.

Quinine, a bitter tasting powder made from the bark of the cinchona tree, is known mainly for its use in malaria treatment.

The nose is a sensitive facial feature that can quickly detect unpleasant smells. Sometimes, certain medical conditions can lead to narrowing of the nasal airway and infections. In some cases, pollen, ragweed and grass can enter the nose and trigger certain nasal conditions.

Consuming gluten is typically safe for most people, unless you are intolerant or allergic to the protein. Gluten intolerance, also known as celiac disease, is an autoimmune disease where the body attacks the lining of the small intestines, causing permanent damage.

Mold and mildew allergies occur when the immune system erroneously responds to mold spores, causing symptoms that include itchy eyes, sneezing and fatigue.

One of the most common food allergies among children is a milk allergy, according to MayoClinic.com. Although the allergic reaction is typically related to cow’s milk, you may be allergic to other types of milk, such as that from goat and sheep.

Salicylates are a natural chemical produced by plants, believed to be used as a pest repellent, according to the Auckland Allergy Clinic. Salicylates are naturally related to the chemical compound, salicylcic acid, found in aspirin.