Hyperpigmentation is possible after electrolysis. The inflammation caused by the electrolysis destruction can sometimes stimulate melanocytes (pigment cells in the skin) to produce pigment.
This reaction is called post-inflammatory hyperpigmentation. When this happens in electrology, tiny dark patches or dots appear 2 to 6 weeks after treatment where each hair was epilated. These marks may persist for 4 to 6 months, but disappear as the skin recuperates. This reaction can develop on any patient. However, this reaction is most common in darker-skinned patients. It rarely occurs in lighter-skinned patients. Sunlight seems to encourage this reaction. Therefore we advise our patients to protect against the sun for 2 to 3 weeks after treatment.
In very rare instances, inflammation from electrolysis arrests the pigment production of the pigment cells and causes white spots, or hypo-pigmentation. In all such cases the melanocytes recuperate and the skin fully returns to normal; usually within several months.