1. A method for analyzing lip conditions associated with a subject, comprising: acquiring a first white-light image and a first UV image of the lips of a subject, each of the first white-light and UV images include a plurality of pixels, each pixel in the first UV image corresponding to a respective pixel in the first white-light image; generating a lip mask based on data in the white-light image, said lip mask having a plurality of elements each corresponding to a respective pixel in the first white-light image and the first UV image, wherein each of the plurality of elements is assigned a value; examining properties of each pixel in at least the first UV image; identifying lip-pixels in the UV image, wherein said identifying step comprises: for each pixel in the first UV image, determining if the pixel is a lip pixel by looking up the value in a corresponding element in the lip mask; and obtaining results associated with at least one lip condition using information in the lip-pixels in the UV image.