PROBLEM TO BE SOLVED: To provide a technique capable of easily grasping factors of a skin trouble.SOLUTION: A skin analysis method, that is a method except a medical behavior, comprises a redness acquisition step (S11) of acquiring redness information of the skin of a subject and an estimation step (S12) of estimating body factors of a skin trouble of the subject by using the redness information acquired by the redness acquisition step.SELECTED DRAWING: Figure 1【課題】肌トラブルの要因を容易に把握可能とする技術を提供する。【解決手段】肌分析方法は、医療行為を除く方法であって、被験者の肌の赤み情報を取得する赤み取得工程(S11)と、前記赤み取得工程で取得された赤み情報を用いて、前記被験者の肌トラブルの体内要因を推定する推定工程(S12)と、を含む。【選択図】図1