What should I do if I develop small red spots all over my body due to an allergic reaction?

When experiencing an allergic reaction with small red rashes all over the body, the following measures can be taken: 1. **Avoid Allergens**: Identify and stay away from substances causing the allergy, such as foods, medications, pollen, etc., to prevent further worsening of symptoms. 2. **Medication**: Take oral antihistamines such as loratadine or cetirizine to effectively relieve allergic symptoms. If itching is severe, topical treatments such as calamine lotion or compound camphor cream may be used to alleviate itching. 3. **Skin Care**: Keep the skin clean and dry, wear loose and breathable clothing, and avoid excessive friction or pressure on the skin. Additionally, refrain from scratching the affected areas to prevent infection. 4. **Dietary Adjustments**: Avoid consuming spicy, irritating foods and seafood, which may trigger allergies. Increase intake of foods rich in vitamins and antioxidants, such as fresh fruits and vegetables, to strengthen the immune system. 5. **Seek Medical Advice**: If symptoms persist or worsen, seek prompt medical attention from a healthcare professional. The doctor will provide a more specific treatment plan based on the individual condition.