The Blemish Remover quickly removes blemishes and other imperfections in your photos. It's usually used to fix point-like stains, blemishes and acnes on skin/face.
The Blemish Remover works similarly to the Clone Stamp: it paints with sampled pixels from an image or pattern and matches the texture, lighting, and shading of the sampled pixels to the pixels being healed. Unlike the Clone Stamp, the Blemish Remover doesn’t require you to specify a sample spot. The Blemish Remover automatically samples from around the retouched area.