Can back acne scars be treated with laser?

Mar 22, 2025 Source: Cainiu Health
Disease description:

I am 23 years old this year. I used to have acne on my back, which left behind acne marks. I want to get rid of them and would like to know whether laser treatment can be used for back acne marks.

Doctor's answer (1)
Dr. Chen Lu

In general, back acne marks can be removed with laser treatment. Laser acne removal works on the principle of photothermal action, using laser energy of specific wavelengths to penetrate into the subcutaneous tissue, stimulate collagen regeneration, and break down pigment particles to promote their metabolism and fading. Whether the acne marks on the back are pigmented or scarred, laser treatment can achieve good removal effects.

During the treatment process, the laser can penetrate the epidermis and reach the subcutaneous tissue, decomposing the pigmentation beneath the skin surface, which is then removed from the body through the lymphatic system. At the same time, laser treatment can help eliminate localized acne marks. Additionally, it can stimulate collagen regeneration beneath the skin, aiding in skin repair and whitening.

However, laser treatment also carries certain risks and side effects, such as redness, pain, and hyperpigmentation. Therefore, before undergoing treatment, it is important to consult thoroughly with a professional dermatologist to understand the treatment process, potential risks, and post-operative care. Moreover, sun protection is essential after laser treatment; exposure to sunlight should be avoided to prevent compromising the treatment outcome or causing new skin problems.