Allergies may cause dizziness, but dizziness is not necessarily caused by allergies. Allergies are relatively common in clinical practice, but dizziness is not a common symptom of allergies. Clinically, allergies are mainly characterized by redness and swelling of the skin, sore throat, runny nose, nasal congestion, redness, swelling or itching of the eyes, and other symptoms, and severe episodes of respiratory distress and shock may occur. Dizziness caused by allergy is mostly due to taking anti-allergy drugs, or when the allergic reaction is more serious. Anti-allergic drugs can enter the brain tissue through the blood-brain barrier, causing drowsiness, dizziness, fatigue and other side effects, generally the first generation of H1 receptor antagonist is more obvious, such as benadryl, clomustine and so on. Patients with severe allergic reactions can lead to anaphylaxis, manifested as dizziness, decreased blood pressure or even fainting, at which time timely resuscitation is required. Dizziness is not a specific manifestation of allergy, causing dizziness for more reasons, such as cardiovascular and cerebrovascular diseases, anemia, cervical spine disease, peripheral vertigo disease, otolithiasis, Meniere’s disease, vestibular neuronitis, etc., the patient will produce dizziness, nausea symptoms. Therefore, if allergic symptoms or dizziness symptoms occur, you should consult a doctor in time for examination and symptomatic treatment.