Why do you ask?: Freckles darken and lighten depending on sun exposure and occur in groups. A lentigo is a solitary dark spot that's flat. A nevus tends to be larger than a lentigo and may be palpable. The latter two are often called "moles". A pathologist can tell the difference on biopsy. It's more important that you be able to recognize lesions suspicions for melanoma and get them off promptly.
Answered 12/28/2015
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