Swollen lymph nodes behind the ear usually resolve in 1-2 weeks, and take more than 3 weeks to resolve in patients with low resistance. Swollen lymph nodes behind the ear are usually caused by infections in the surrounding tissues and organs. Common causes include gingivitis, tonsillitis, mumps, otitis media, and mouth ulcers. Patients with mild conditions can heal themselves in about 1 week by adjusting their lifestyles; patients who cannot heal themselves can take oral antibiotics or antiviral drugs, together with traditional Chinese medicine to clear heat and lower fire, and can be cured in 1-2 weeks; patients with more serious conditions should seek timely medical consultation to identify the causes and carry out anti-infection treatment for the causes, or even infusion treatment or surgery to deal with the primary lesion, and can be cured in 2-3 weeks after standard treatment; if patients have low resistance, the healing time is mostly more than 3 weeks. In addition, patients with swollen lymph nodes behind the ear should pay attention to rest, drink more water, eat a light diet, avoid spicy and stimulating foods, avoid staying up late and relieve tension.