Patient: Two years ago, a colleague happened to notice a lump under my right posterior ear, which I felt was much larger than the left. It was soft and could slide. At that time, I did not feel anything, and after going to the hospital for examination, the doctor told me to observe it for a while. Later, I didn’t notice it anymore because I was busy at work, but for about a year, I felt that my face often itched, my gums bled easily when I rinsed my mouth, and my mouth was dry all day, especially at night. The lower part of my right eye is also often throbbing, my shoulders and legs and feet are sore all day, my ears are ringing, I have insomnia, and half a year ago I found that I could feel half a grain-sized hard object in my cell, so I am quite nervous. I’m very nervous. I would like Dr. Xu’s advice on what could be the problem, and what department should I go to for a more appropriate examination? And what are the more direct and accurate tests. Thank you! No. Please tell me what is the problem and what is the most appropriate department for me to go to? What is the most accurate test. Xu Chengzhi: Hello, I just came back from a business trip, please excuse the delay in reply! If the lump you mentioned happens to be behind the auricle (especially near the sulcus behind the ear) and appears to be sometimes enlarged or slightly red, and then gets better after a good rest or anti-inflammatory treatment, it is most likely to be a sebaceous cyst behind the ear, which is very common and I have operated on many cases. The lump is superficial, because the lump can become infected repeatedly, so the scar adhesions can form a hard lump. If it is slightly deeper and farther from the sulcus behind the ear, it may be a retroauricular lipoma, which usually does not shrink on its own and can be surgically removed. At present, most of your cases belong to benign skin or subcutaneous lumps, so you don’t need to be too nervous, because your work strain or combined with other discomfort will only aggravate your mood tension, and overwork will also make the sebaceous cyst easy to be infected, so you need reasonable rest. I feel that ultrasound will be fine, if the doctor has seen it and feels sure that it is the above two diseases, then it is straightforward to do some minor pre-surgery routine checks on the line, no need to do the ear examination.