Acne on the back and chest is usually associated with folliculitis and acne.
1. Folliculitis: Patients with folliculitis will have red papules or pustules centered on hair follicles, and folliculitis can occur in any area where there is hair. Its causes are mainly related to infections such as Staphylococcus aureus and Malassezia, and it can also be triggered by trauma and immune deficiency.
2. Acne: Acne patients may have pustules, papules, pimples and other symptoms, and the back and forehead are the most common areas for acne. The etiology is related to factors such as increased androgen levels, inflammatory response, and excessive sebum production.
There are many causes of acne on the back and chest, and patients are advised to seek medical examination to clarify the cause.