Hi external swelling of lymph node of neck doesn t compress food pipe so much to cause dysphagia. Although neck lymph nose enlargement may suggest inflammation or swelling of inner throats structures like tonsils or pharynx due to infection & this may give feeling of something stuck in throats and difficulty in swallowing. Give her warm liquid to drink. Throat infection because of virus should subside in one week time with conservative measures like gargling if possible, warm liquid to drink, paracetamol. If it persist see a doctor for bacterial superinfection. In that case she will need antibiotics.