Dermatoscopy is an examination of selected skin lesions with a dermatoscope which magnifies the image 10-70 times. Thanks to the lateral light we get three-dimensional image of the skin. Dermatoscopy evaluates whether the tested structure is a melanocytic lesion (melanocytes) and if so, whether it is benign, suspicious or malignant. Dermatoscopy examinations are a very important in terms of preventive measures. Early diagnosed melanoma can be completely cured. Computer dermatoscopy assess the changes under high magnification of up to 70 times, carries out an analysis, using the software and archives photos that have already been taken.