The possible clinical causes of acne on the front of the chest include folliculitis, acne, and boils. 1. Folliculitis: This condition refers to an inflammatory skin disease in which the hair follicles are mainly involved, which is mainly related to bacterial infection of the hair follicles, and is clinically manifested as red pimples centered on the hair follicles, accompanied by itching, pain and other symptoms. 2. Acne: This is a chronic inflammatory disease of the sebaceous glands of the hair follicles, which is associated with elevated levels of androgens and exuberant secretion of the sebaceous glands, and is characterized by pimples, papules, and pustules on the affected area of the skin. 3. Boil: This condition refers to an acute purulent inflammation of the hair follicle and its deep surrounding tissues, mostly dominated by Staphylococcus aureus infections, with clinical manifestations of single or multiple red, hemispherical painful nodules on the affected skin, and pus heads appearing in the center of the nodules. This condition may also be related to other skin and soft tissue diseases, patients should go to the regular hospital dermatology department, through the examination to clarify the cause of the disease, so as to carry out targeted treatment.