For a mild allergic reaction, an over-the-counter non-drowsy antihistamine such as cetirizine, loratadine, or fexofenadine can help relieve symptoms like hives, sneezing, or itching. If she has a localized itchy skin rash, applying a mild hydrocortisone cream can also provide relief. Please follow the package instructions for her age group, or consult a pharmacist or her pediatrician to confirm the correct dosage. If she experiences any severe symptoms like difficulty breathing, swelling of the face, lips, or throat, or dizziness, please seek emergency medical care immediately.