What is the most effective treatment for brown spots on legs?

You mention a technician - was this a physician or skin-trained RN or PA?It's always wise to take the time and make the investment if necessary in a full consultation with a fully educated and trained medical specialist. BBL and Pico are both reliable treatment options for discoloration as you experienced on other treated areas. That the areas on your legs are more resistant could mean you have more than just a "brown spot".Without the proper diagnosis of the skin problem, a review of your lifestyle habits, medication intake, genetic background and more, it's easy to end up with a hit and miss scenario as you describe.There are countless machines and treatment options for brown spots but not all are appropriate for all patients and conditions or body areas. I'd advise you to seek out a board dermatologist who has long term experience and multiple devices to choose from. Of course sunscreens uses daily are an important part of any pigmentation reduction program. So if you aren't covering your legs with long pants, be sure to apply sunscreen to all exposed skin.

The Lumecca IPL is one of the more popular treatments. It’s benefits include:
• The procedure can be customized to suit different skin tones and textures.• The intensity of the pulsed light can be varied accurately by the skin care specialist. This helps to improve the efficiency of the method.• Even severely damaged skin and pigmentation issues can be corrected thanks to the high power light technology being used.• The treatment on the whole is quick and can be used to address a large area.• Most conventional IPL methods might call for a lot of repetitions to obtain perfect results, but with Lumecca IPL, most cases may only require one to two treatment sessions to show results.• The procedure is non-invasive and does not cause any discomfort. Recovery after the procedure is also almost instantaneous.