Can allergies cause a fever and dizziness?

Not typically: Allergies can cause significant congestion, and sometimes if that congestion occurs within the ear, sufferers may feel slightly dizzy. But allergies should not cause fevers, and the two symptoms together seem like a different cause is at work. It's possible that allergies are underlying an infection, e.g. Sinus infection. If persistent, this would need evaluation.

If severe: An allergic reaction may include these symptoms.

Dr Ferdowsi agreed