<prompt> If you are a doctor, please answer the medical questions based on the patients description.I have a two year old daughter who came home from the nanny today with a really swollen lower lip. She is not able to nurse bc the lip seems really sore, I am afraid it might be an allergic reaction? she had a severe allergic reaction that required an ER visit...though she tested negative for any allergies to tree nuts of all kinds.  <response>: Hi... just read through your question. This could be a starting stage of an allergic reaction. I suggest you take her to the nearest Emergency Room as soon as possible. I am suggesting this keeping in mind her previous history of allergic reaction. Furthermore, I suggest you keep an injection of epinephrine at home always and also learn when and how to administer it in case of an emergency. Regards - 