Hello. Thank you for your question. Without an exam, it is difficult to diagnose what is going on. Generally speaking, however, this could be a sign of her body fighting infection, as you state. A lymph node will swell as it fights infection, whether it s viral or bacterial. In the case of viral, the illness will ultimately resolve on it s own. In the case of bacterial, antibiotic may be required. If the lymph node itself is infected, as evidenced by continued growth and pain, antibiotic may be required. We have to consider the possibility that this may not be a lymph node and might be a worsening skin infection, which is a stronger indication for antibiotic treatment. I agree with you that we want to avoid antibiotics whenever possible. However, I still recommend that you consult with your doctor so that the correct diagnosis can be made. Once that is done, appropriate treatment plans can be discussed.