Facial discoloration often feels like it appears overnight. A few weeks of sun, heat, pool days, outdoor workouts, or patio lunches can make brown patches and spots look darker, larger, and harder to cover. The truth is that pigment change usually builds slowly, then becomes more visible when the skin gets triggered. Two of the most common causes are melasma and solar lentigines, often called sun spots or liver spots. They can look similar at first glance, but they behave differently and need...

A patient loves the mirror at two weeks. By week three or four, they may feel strangely disappointed. The lips look “normal.” The softened lines seem to have returned. The lifted brow no longer feels lifted. They come back worried that their dermal filler dissolved, their neuromodulator wore off, or the treatment simply did not last. Often, the result has not vanished. The eyes and brain have adjusted. This is the core of perception drift in aesthetics. It describes the way a person’s visual...