Treatment of hypopigmented acne scarring using microneedling, or other less resource intensive modalities than frac laser?

Loss of pigment, or hypopigmentation, from any cause, including the kind that can arise following the resolution of acne, tends to be notoriously difficult to treat with any current modality. Parenthetically, the same can be said of Ivory white scars, as well other types of loss of pigmentation problem that may result from prior injury or treatments, such as infections, trauma, scalpel surgery, lasers and chemical peels that damage the pigment producing layer of our skin.For well over a decade,  have had a gratifying measure of success with repigmentation, regardless of the prior cause of the pigment loss, using a combination of medical microneedling followed immediately by the application of tyrosine cream. Tyrosine is the naturally occurring amino acid that plays a crucial role in melanin production in our skin. (It is this process that  we try to suppress with agents like hydroquinone when treating overpigmentation or HYPERpigmentation). Successful treatment of hypopigmentation with the above approach usually requires a series of generally three to four (sometimes more) treatments spaced at four to six week intervals. 

You have asked in excellent question but it is one which would be best opposed to someone who is examining you in person and who also has experience in the treatment of acne scarring.  There are multiple different approaches that can be used to improve the appearance of acne scars.  The approach which is best for you can only be determined after learning your objectives, consideration of risks and benefits, and determining whether your expectations re likely to be met by any given treatment.

This is best treated with fractional nonablative lasers such as fraxel or clear and brilliant.  In the right hands they are very safe and can give amazing results.  Sometimes hypopigmentation cannot be reversed or can be made worse and so finding an expert to treat you is essential.  Best, Dr. Emer.