What type of laser removes a dark freckle from the face? CO2 Laser?

The terms dark freckles, moles, sunspots, etc. are for the most part bandied about quite loosely, but really are quite different kinds of spots, each requiring a different approach. So, appropriate diagnosis is the first step before a specific treatment approach can be suggested. The term moles specifically refer to benign pigmented lesions that can be perfectly flat and flush with the surrounding skin or elevated into prominent bumps. Melanomas, a very serious, potentially life-threatening "moles," which also can be flat and appear perfectly innocent. Freckles are benign and "sunspots" can be benign hyperpigmentation or even pre-malignancies. So, you see that going ahead with destructive modalities or removing brown spots without being sure what they are is not recommended; all too many melanomas have unfortunately been burned away by cautery, lasers or strong chemicals only to recur later in more serious forms. So, you would be wise to consult a board certified dermatologist who can establish the diagnosis and then recommend the best treatment approach.