Lentigo Simplex:
A parent's guide to condition and treatment information

Lentigo simplex is a type of colored (pigmented) lesion that is not caused by sun exposure, although it looks like the freckle-like condition caused by sun exposure called solar lentigo. In both conditions, an increased number of pigment-producing cells (melanocytes) is present. Lentigo simplex can occur anywhere on the body, including areas that are not exposed to sunlight. Multiple lentigos are associated with several inherited syndromes, but lentigo simplex also can occur as a single lesion. Single lesions often develop on the lips or on the gums. Lesions may be caused by some forms of ultraviolet light therapy. If this is the case, the lesion may be seen as identical to those caused by exposure to sunlight.