Can I use Hydroquinone to prevent a mole from growing back?

Hydroquinone will not help with a mole but will help prevent hyperpigmentation.  I suggest you see a cosmetic dermatologist with experience. Best, Dr. Emer.

Thank you for your question.  It is unlikely that hydroquinone will prevent a mole from returning after a laser treatment.  Hydroquinone can inhibit pigment from forming.  However, when you have a mole, the melanocytes (or cells of a mole) are already there.  A laser can destroy some of them but it is unlikely to removal all of the cells (hence a repigmentation).  If the mole is going to repigment it will do so whether or not you use a topical product.  A high SPF zinc or titanium sunscreen daily is highly recommended.If you use hydroquinone I recommend up to a 4% preparation.  Anything higher has a possibility of making the pigment worse in a small percentage of patients.  I recommend yearly skin checks with a dermatologist.  Laser treatments of moles can make the mole look abnormal and more difficult to rule out cancer in the future. 

HiHydroquinone is effective at reducing superficial pigmentation, eg freckles or melasma (mask of pregnancy).  It will not have any effect on the recurrence of a mole after removal or the pigmentation that a mole produces.  That pigmentation is too deep in the skin and unrelated to the pigmentation that is treated by hydroquinone.