Allergies are a common challenge for people with parasites. Your gut can be out of sync causing an imbalance and allergies. Parasites are unwanted pathogens and often cause allergic reactions as well as other reactions that are very similar to allergy symptoms.
Because of certain parasites ability to induce IgE production and mast cell degranulation (either directly, e.g. Ascaris, or via specific IgE) it is possible that some induce allergic manifestations.