Swollen lymph nodes behind the ear usually take 1-2 weeks to fully recover, and if the patient’s resistance is low, the course of the disease can last more than 3 weeks. The most common cause of swollen lymph nodes behind the ear is inflammatory infections of the surrounding tissues and organs, commonly found in gingivitis, tonsillitis, mumps, otitis media, oral ulcers, etc. The most common cause of swollen lymph nodes behind the ear is inflammatory infections of the surrounding tissues and organs. Patients with mild disease can recover in about 1 week through lifestyle adjustments. Patients with more serious conditions should go to the dentist and other departments in a timely manner and be treated for the cause of the disease, for example, mumps need to be treated with anti-infective treatment for the causative organisms. After standardized anti-inflammatory and anti-infection treatment can be cured in 2-3 weeks. In addition, patients should ensure adequate rest during treatment, eat a light diet, relieve tension, and avoid eating spicy and irritating foods.