The pain behind the earlobe may be clinically related to the following diseases: 1. Inflammation of the lymph nodes behind the ear may be secondary to otitis externa or acute otitis media, acute tympanitis, or parotid inflammation, in which case the primary lesion can be found clinically and the ultrasound can show inflammatory changes in the lymph nodes, and anti-inflammatory treatment can be effective; 2. Generally, this kind of infection is more likely to occur in patients who often eat greasy, spicy and stimulating food, mainly because the local sebaceous gland cyst secretion is blocked and the infection is formed after repeated accumulation. In the early stage, you can give antibiotic ointment and advise patients to eat a light diet, most patients can disappear on their own, if it is larger, the local formation of abscess or rupture, you need to carry out debridement and drainage surgery.