Yes of course. Allergy is an acquired hyper sensitivity to a substance (allergen) that may not normally cause a reaction. It is essentially a disorder of immune system resulting in antibody-antigen reaction. But, in some cases there may be a genetic predisposition to acquire a particular type of allergy, where we can't find any antibody.
Allergic conditions include:Eczema, allergic rhinitis or coryza, hay fever, bronchial asthma Symptoms like eosinophilia, nasal congestion, tearing, sneezing, wheezing, coughing, itching rash, eruptions
Etiology: pollen, dust, hair, fur, feathers, wool, chemicals, drugs, insect bites and specific foods such as eggs, chocolate, milk, wheat, tomatoes, citrus fruits, oat-meal, potatoes.
21th century syndrome: They develop symptoms like allergic to every thing in the environment. This is most probably due to acute or chronic emotional stress. The individuals may isolate themselves from environmental materials. Allergic conditions could be genetic or might have been developed later on due to a specific cause. Homeopathy improves multiple symptoms of allergic condition with a single remedy.