Allergic conditions
8 conditions that allergies cause or set off: what each one is, its symptoms, what triggers it, and when to see an allergist. Every claim links to its source.
Hay feverHay fever is an allergic reaction in the nose to pollen, mold, dust mites, pets or cockroaches. It can come with the seasons or last all year.Allergic asthmaAllergic asthma is asthma set off by allergens such as pollen, mold, dust mites and pets. It is the most common type of asthma.EczemaA long-lasting, itchy skin condition that usually starts in childhood. It is often linked with food allergy, hay fever and asthma.Contact dermatitisA rash where the skin touched something. It comes from irritation, or from an allergy to things like nickel, poison ivy, fragrances or rubber.AngioedemaAngioedema is swelling in the deeper layers of the skin. Foods, stings, some drugs and a rare inherited condition can cause it, and throat swelling is an emergency.Oral allergy syndromeAn itchy or swollen mouth after eating certain raw fruits, vegetables or nuts, caused by food proteins that resemble pollen proteins.Latex-fruit syndromeSome people with latex allergy also react to certain foods, most often banana, chestnut and kiwi. Reactions can affect the whole body.Alpha-gal syndromeA tick bite can leave some people allergic to red meat and other mammal products. Reactions usually start hours after eating and can be life-threatening.
Looking for one symptom? Allergy symptoms answers “Can allergies cause it?” for 26 of them. Pages about anaphylaxis wait until a clinician has reviewed them.