### Potential Relationship Between Skin Itching and Rabies Vaccine **Disease Overview:** Skin itching is a common symptom that can be caused by various factors, including allergies, infections, and drug reactions. The patient received a rabies vaccine 5 days ago and has since developed skin itching and redness. **Possible Causes:** The rabies vaccine is a common immunoprophylaxis measure, but in rare cases, it may cause local or systemic skin reactions. These reactions are usually mild, such as redness, itching, and swelling, and typically resolve on their own within a few days. Other potential allergens or skin conditions should also be ruled out. **Diagnostic Advice:** Since the patient is unable to visit the hospital, it is recommended to first observe if the symptoms worsen. If the itching and redness resolve on their own within a few days, there is no need for excessive concern. If the symptoms persist or worsen, it is advisable to consult a dermatologist via telemedicine and consider anti-allergic treatment if necessary. **Care and Prevention:** 1. Avoid scratching the skin to prevent infection. 2. Use mild skincare products and avoid irritating cosmetics or detergents. 3. Keep the skin clean and dry, and wear loose, breathable clothing. 4. If the symptoms are severe, you can use antihistamines such as loratadine. **Reminder:** If you experience fever, difficulty breathing, or other severe allergic reactions, seek medical attention immediately. **Allergy History and Past Medical History:** The patient had a similar condition in 2019 but has no other medical history, indicating potential sensitivity to certain substances, which requires further investigation.