Sudden enlargement of cervical lymph nodes may be caused by strenuous exercise, such as neck soft tissue injury, acute tonsillitis, thyroid malignant tumor and other diseases. The cervical lymph nodes are thin and generally smooth, and they will not feel pain. In the case of sudden swelling, it is best to go to the hospital for symptomatic treatment in time.

1. Neck soft tissue injury: This condition generally does not need special treatment, and will be repaired by itself after a period of time. Pay more attention to rest during the recovery period and avoid strenuous activities. We can use hot compress to promote blood circulation.

2. Acute tonsillitis: First, symptomatic treatment is recommended. You can take orally cefoperazone sodium, amoxicillin capsules and other anti-inflammatory and detumescence treatments. Pay attention to your allergies before taking the medicine. If the lymph node enlargement is obvious, it can be surgically removed for treatment.

3. Thyroid malignant tumor: It is recommended that the patient be given local radiotherapy or radiotherapy combined with systemic chemotherapy under the guidance of a doctor after diagnosis. During the treatment, they should keep a positive attitude, pay attention to a healthy diet and eat more fresh fruits and vegetables.

In addition to the above common reasons, there are other possibilities, such as lung cancer. It is suggested that patients should go to a regular hospital for examination and targeted treatment if they are uncomfortable.