How effective is fractional laser treatment for exogenous ochronosis?

Exogenous ochronosis is a dark or blue-grey discolouration linked to exposure to certain skin-lightening products, often containing hydroquinone. Pigment may sit in deeper skin layers, where surface treatment is less predictable than treatment of a superficial mark. Fractional laser creates microscopic treatment zones that can stimulate repair and may alter the appearance of affected skin. It can also trigger inflammation and temporary or lasting darkening, particularly in skin that tends to pigment after irritation.

Stop the suspected triggering product only with medical guidance if the diagnosis or product is uncertain, and bring product details to the appointment. A dermatologist may examine the colour and distribution, review previous treatments, and use a cautious test area before broader treatment. During recovery, use the recommended gentle skincare and strict sun protection. Avoid bleaching products, scrubs, and unapproved acids on treated skin because irritation can deepen discolouration.

Seek review if redness, burning, swelling, blistering, crusting, or pain is increasing, or if the treated area becomes markedly darker. Contact the clinic for signs of infection such as worsening warmth, tenderness, or discharge. A new pattern of spreading pigmentation or irritation should be assessed before another session is planned.

Ask how confident the diagnosis is, whether a test area is suitable, what degree of lightening is realistic, how pigment risk will be managed, and when further treatment should be reconsidered.