👉 Exanthematous is a medical term that describes an allergic reaction characterized by redness, itching, swelling, and warmth in the skin. It can be triggered by various stimuli such as pollen, dust, animal dander, or certain medications. Common symptoms include hives, rashes, and other forms of inflammation. Exanthematous reactions are often associated with allergies and are typically treated with antihistamines or corticosteroids to reduce the severity and duration of the reaction.