Pain on the left side of the chin when pressed is usually not caused by AIDS, but by inflammation. You should not judge whether it is AIDS based on this symptom alone, but also combine it with other symptoms or tests to identify the cause in time. Painful pressure on the left side of the chin may be caused by inflammation of the gums or mumps, or by soft tissue injury caused by external impact. Patients with AIDS may have a variety of infections and inflammatory diseases due to their severely compromised immune function, which may lead to painful pressure on the chin, but may be combined with other more obvious symptoms such as persistent irregular fever, chronic diarrhea, and weight loss. Therefore, the presence of painful chin pressure alone cannot be diagnosed as AIDS, and a clear diagnosis is needed through relevant tests. If a patient has painful chin pressure, the first thing to consider is inflammation, but if the pain persists without relief, it needs to be taken seriously and can be seen by the infection department of the hospital.