14-year-old acne can be eliminated through the use of drugs, as well as laser, photodynamic and other physical methods. Acne at the age of 14 is mostly due to puberty, and hormone levels change, androgen secretion increases sebaceous gland secretion combined with Propionibacterium acnes and cause acne, usually need to pay attention to light nutritional balance, avoid high sugar, high oil diet, avoid staying up too late, and regular work and rest. Acne can also be treated with medication, such as retinoic acid, benzoyl peroxide and other topical medications, and in severe cases, oral doxycycline, isotretinoin and other medications. In severe cases, oral doxycycline can also be used. In addition, physical therapy such as laser and photodynamic therapy can also be used, which requires a professional physician’s evaluation to provide a standardized diagnosis and treatment plan. Acne that occurs during puberty is self-limiting and can gradually subside after hormone levels stabilize. If acne symptoms worsen, you should consult a doctor and take medication as prescribed by your doctor.