An analysis unit for assessment of hair condition is described. The analysis unit comprises a map processor (MPP'). The map processor (MPP') is arranged to at least: obtain a first follicular map (FM1) representing a first plurality of hair root positions in a first videodermoscopy image, obtain a second follicular map (FM2) representing a second plurality of hair root positions in a second videodermoscopy image (IM2), determine a common skin area (OV1, OV2) from the first follicular map (FM1) and the second follicular map (FM2), relate hair root positions in the second follicular map to hair root positions of the first follicular map in the common skin area to determine a plurality of related hair root positions, and compare a change in condition of individual hair between the first and second videodermoscopy image to determine the analysis result (ANR2) suitable for assessment of hair condition.
