During the treatment, the darkening of spots can occur. Possible causes are:
Overuse of The Spot Cream will lead to irritation & inflammation, which can cause darkening (post-inflammatory hyperpigmentation).
Inadequate sun protection will cause the darkening of spots. Reapply SPF every 2-4 hours.
At the beginning of using The Spot Cream, there can be mild darkening. This is due to the pigment coming to the surface.