Acne on the neck does not indicate AIDS; folliculitis and acne can also present as symptoms of acne on the neck. However, AIDS patients can also combine folliculitis, acne and other diseases. AIDS patients have a severely compromised immune system and are prone to comorbidities, which can lead to symptoms of neck acne. However, this is not a specific manifestation of AIDS and cannot be used to confirm the diagnosis of AIDS. Common causes of neck acne include folliculitis and acne. Neck folliculitis is mostly due to pathogen infection, such as Staphylococcus aureus, Malassezia, etc., which manifests itself as the formation of red papules around the hair follicles. Neck acne is associated with increased sebum secretion, Propionibacterium acnes infection, etc. It may manifest as skin papules, pustules, etc., accompanied by enlarged pores and seborrhea. The diagnosis of HIV requires a visit to a regular hospital or the CDC for human immunodeficiency virus antigen testing, antibody testing, and viral load testing, and other tests to be performed by a medical professional.