How effective is picosecond laser treatment for exogenous ochronosis?

Exogenous ochronosis is a pigmentary reaction that can develop after prolonged use of certain skin-lightening products, including products containing hydroquinone. Pigment may sit deep in the skin and appear blue-grey, brown, or black. Picosecond pulses can fragment pigment, but they do not reverse the skin reaction or remove an ongoing trigger. The area may respond slowly, unevenly, or with temporary irritation and colour change.

Stopping a suspected causative product under medical guidance is part of managing the problem. A clinician may combine gentle skincare with other options rather than relying on laser alone.

Arrange a dermatology assessment to confirm ochronosis and review every cream, soap, supplement, and cosmetic used on the area. Do not restart a suspected lightening product to test it. Tell the clinician about previous peels, lasers, eczema, acne, recent tanning, and any history of dark marks after irritation. Follow the selected preparation and aftercare plan, protect the skin from sunlight, and avoid scrubbing or picking treated areas.

Contact the clinic if pain, blistering, worsening swelling, spreading redness, pus, or rapidly changing colour appears after treatment. Seek assessment if the pigmentation continues to spread despite stopping a suspected product, or if a single area changes, bleeds, or develops a persistent sore.

Ask how the diagnosis was established, whether any product should be stopped, how deep the pigment appears, and what alternatives exist if laser is unsuitable. Clarify the risk of post-treatment darkening or lightening, aftercare, sun protection, and the review plan.