What if picosecond laser treatment does not relieve dark patches on skin?

Dark patches may sit at different depths in the skin and can follow inflammation, acne, injury, hormonal change, medication, or sun exposure. A laser response can also be limited when the original diagnosis is uncertain or when new pigment is developing while older pigment fades. Heat, visible light, ultraviolet exposure, and irritation after treatment may deepen discoloration in some skin types. A patch that changes in shape, texture, or symptoms should be assessed rather than repeatedly treated.

Contact the treating clinician before booking another session. Ask for the diagnosis, expected visual changes, suitable interval between sessions, and a plan for protecting the area from light. Use the aftercare provided, avoid picking or harsh exfoliation, and apply broad-spectrum sun protection as advised. Tell the clinician about new skincare products, acne treatments, pregnancy, hormonal medicines, or a history of pigment changes after inflammation. A different treatment or observation may be safer than repeating laser immediately.

Seek prompt assessment for severe or worsening pain, blistering, open skin, pus, spreading redness, fever, or a rapidly changing dark patch. Arrange a timely review if the area becomes raised, bleeds, crusts, or develops a new persistent symptom. Do not cover concerning changes with another cosmetic procedure before examination.

What type of pigmentation is being treated? Could inflammation or the laser itself be adding pigment? What protection and skincare should I use now? Should the patch be examined before another session?