Swelling lymph nodes in the left side of the neck and painful swallowing may be due to tonsillitis, tonsil cyst, esophageal cancer and other problems. 1. Tonsillitis: generally refers to a kind of non-specific acute inflammation occurring in palatine tonsils, which manifests as sore throat, red and swollen tonsils, fever, enlarged lymph nodes in the angle of the lower jaw and other symptoms, etc. It can be treated with medicines such as Blue Scutellaria Oral Liquid, Pudilan Anti-inflammatory Oral Liquid, Amoxicillin, Penicillin V Potassium Tablets and other medicines according to doctor’s prescription. 2. Tonsillar hypertrophy: generally due to pharyngeal infection and repeated inflammatory stimulation and other factors caused by glandular secretion blockage of the formation of gray-white cystic protuberance, manifested as tonsil redness and swelling, pharyngeal discomfort, pharyngeal foreign body sensation and other symptoms, as prescribed by the use of penicillin, compound borax solution, cotrimoxazole gargle solution and other medications to carry out the treatment. 3. Esophageal diseases: Inflammation of esophagus, esophageal cancer and other diseases, there will be dysphagia and pain, especially in the case of esophageal cancer, which will be manifested as choking sensation after eating, retrosternal pain, progressive dysphagia, back pain and other symptoms. Swelling left cervical lymph node and painful swallowing need to go to the hospital in time to confirm the diagnosis, and carry out standardized treatment under the guidance of doctor’s prescription.