Different types of laser can be used depending on the type of pigmentation, whether it’s intermediate or hyperpigmentation. There are many environmental factors involved as a reason, such as sunlight. Only a certified dermatologist or brilliant skin clinics like Kaya can help you in this. You may visit Kaya Skin Clinic for the expert solution on this, here: https://www.kayaskinclinic.com/uae/en/treatments/pigmentation/ Just make sure you’re visiting trusted skin care clinic. Hope this gives solution to your problem.