Back acne marks melanin deposits can be removed with topical medications and laser treatments. The melanin deposits of back acne marks will gradually fade with the metabolism of the skin, and some of the acne marks can be eliminated on their own. If you wish to accelerate the fading of acne marks, or if the acne marks are more serious and difficult to fade on their own, you can use topical medication to accelerate local melanin metabolism. You can use topical salicylic acid ointment, retinoic acid cream, hydroquinone cream and other drugs, all help to remove the melanin precipitation of acne marks. In addition to topical medications, laser treatment is also available. The melanin particles at the acne marks are broken down and metabolized out of the body by the energy of the laser. If you have acne melanin deposits on your back, it is recommended that you consult a dermatologist for specific medications, and laser treatment should be performed by a professional.