<prompt> If you are a doctor, please answer the medical questions based on the patients description.My 12 month old all the sudden has a severe swollen upper lip only, no rash or temperature. For a few days prior she has had a horsy voice. Should I be concerned? Not sure if she got to much sun today or had an allergic reaction to some fresh fruit we fed her or is it something else.  <response>: Welcome to the ChatDoctorIt seems that your baby is showing allergic reaction. The allergen could be any new feed introduced recently, airborne allergen, insects or others. I would recommend you the following to help her out:1. Try to find out the allergen and eliminate if possible. 2. Start her on antihistamine such as Spy, Ben Chat Doctor. 3. In case of any breathing difficulty, immediately contact ER. Severe reactions can need more intensive treatments such as epinephrine or steroids. But these require expert supervision. You may also take help from an Allergist. Hopefully this will be useful. I would be happy to help you with any further questions. Take care 