Treatment for Facial Brown Spots?

Have a dermatologist or plastic surgeon take a look. First be sure that the areas are not abnormal growths that require biopsy and treatment to prevent spread or turning into something worse.
Likely there is no medical concern. If not, the hyperpigmentation spots can be from inflammation, hormones, sun exposure, age or heredity. Treatment methods include various chemical peels, liquid nitrogen, bleaching creams and various intense pulsed light/laser systems from miminally invasive to ablative.
Most important is that with any treatment, prevention of recurrence is essential, through the use of sunblock (SPF 30+ is better) and various bleaching creams on an ongoing basis to prevent post-inflammatory (after any treatment that involves controlled "wounding" of the skin) hyperpigmentation.

Thank you for your question.  CO2 laser skin resurfacing treatment is very beneficial for making acne scars diminish, removing age spots, increases collagen and elasticity production.  This is done by removing deeper layers of damaged skin and stimulating the regeneration of healthy skin underneath. This treatment is also beneficial for uneven pigmentation, photodamage, fine lines and wrinkles, precancerous spots, and a host of other skin imperfections and benign lesions. If you believe you may be a candidate for CO2 laser skin resurfacing treatment, a qualified cosmetic surgeon or dermatologist can carefully analyze your skin and determine if the procedure is right for you

Overexposure to UV rays result in age spots so the best solution is to wear and reapply sunscreen every day! At my practice, I offer my patients laser resurfacing, Clear & Brilliant, Intense Pulsed Light, q-switched alexandrite, and fractionated Fraxal Dual laser. These laser treatments have all been tested and proven effective at reducing dark age spots and giving a bright and youthful appearance! I recommend consulting with a board-certified dermatologist who is an expert in laser treatments to ensure you are getting the best results!