What disease causes red lumps on the chest and back

Acne vulgaris may be distributed on the chest and back. Due to the dense distribution of sebaceous glands and hair follicles in this area, once there is an inflammatory infection or a local conditional pathogen infection, such as Propionibacterium acnes or Staphylococcus albus infection, it may show inflammatory manifestations. Acne vulgaris is normally seen. It is also possible that the keloid formed after the wound is shown in this part. After the formation, it is generally not easy to automatically subside. Some people may gradually increase, and even accompanied by itching symptoms. In addition, it may also be the Malassezia folliculitis formed by the Malassezia infection shown in this part. At this time, the red keloid may also be accompanied by different degrees of itching symptoms, but it may generally be manifested as inflammatory papules consistent with hair follicles.